Zahari Zlatev

125 papers A 2Misc 4Journal 44Unranked 71
YearRankTypeTitle / Venue / Authors
2023 — conf
Development of New High Performance Computer Architectures and Improvements in Danish Eulerian Model for Long Range Transport of Air Pollutants.
LSSC
Krassimir Georgiev, Zahari Zlatev, Ivan Lirkov
2021 J jnl
Advanced stochastic approaches for Sobol' sensitivity indices evaluation.
Neural Comput. Appl.
Venelin Todorov, Ivan Dimov, Tzvetan Ostromsky, Stoyan Apostolov, Rayna Georgieva, Yuri Dimitrov, Zahari Zlatev
2021 — conf
Multidimensional Sensitivity Analysis of an Air Pollution Model Based on Modifications of the van der Corput Sequence.
LSSC
Venelin Todorov, Ivan Dimov, Rayna Georgieva, Tzvetan Ostromsky, Zahari Zlatev, Stoyan Poryazov
2021 — conf
Running an Atmospheric Chemistry Scheme from a Large Air Pollution Model by Using Advanced Versions of the Richardson Extrapolation.
LSSC
Zahari Zlatev, Ivan Dimov, István Faragó, Krassimir Georgiev, Ágnes Havasi
2021 — conf
Sensitivity Study of Large-Scale Air Pollution Model Based on Modifications of the Latin Hypercube Sampling Method.
LSSC
Tzvetan Ostromsky, Venelin Todorov, Ivan Dimov, Rayna Georgieva, Zahari Zlatev, Stoyan Poryazov
2020 J jnl
Advanced numerical methods for complex scientific and engineering problems: Editorial introduction.
J. Comput. Appl. Math.
Zahari Zlatev, Pasqua D'Ambra, István Faragó, Vladimir Shaydurov, Lubin G. Vulkov
2020 J jnl
Explicit Runge-Kutta Methods Combined with Advanced Versions of the Richardson Extrapolation.
Comput. Methods Appl. Math.
Zahari Zlatev, Ivan Dimov, István Faragó, Krassimir Georgiev, Ágnes Havasi
2020 J jnl
Numerical Methods for Scientific Computations and Advanced Applications II: Preface.
Comput. Math. Appl.
Krassimir Georgiev, Zahari Zlatev, Ivan Georgiev
2020 — conf
Optimized Quasi-Monte Carlo Methods Based on Van der Corput Sequence for Sensitivity Analysis in Air Pollution Modelling.
WCO@FedCSIS
Venelin Todorov, Ivan Dimov, Tzvetan Ostromsky, Zahari Zlatev, Rayna Georgieva, Stoyan Poryazov
2020 — conf
Sensitivity Study of a Large-Scale Air Pollution Model by Using Optimized Latin Hyprecube Sampling.
WCO@FedCSIS
Venelin Todorov, Ivan Dimov, Tzvetan Ostromsky, Zahari Zlatev, Rayna Georgieva, Stoyan Poryazov
2019 — conf
Advanced Quasi-Monte Carlo Algorithms for Multidimensional Integrals in Air Pollution Modelling.
HPC
Venelin Todorov, Ivan Dimov, Tzvetan Ostromsky, Zahari Zlatev
2019 — conf
Efficient Stochastic Algorithms for the Sensitivity Analysis Problem in the Air Pollution Modelling.
LSSC
Tzvetan Ostromsky, Venelin Todorov, Ivan Dimov, Zahari Zlatev
2019 — conf
Sensitivity Studies of an Air Pollution Model by Using Efficient Stochastic Algorithms for Multidimensional Numerical Integration.
HPC
Tzvetan Ostromsky, Venelin Todorov, Ivan Dimov, Zahari Zlatev
2019 — conf
Studying the Influence of Climate Changes on European Ozone Levels.
LSSC
Zahari Zlatev, Ivan Dimov, István Faragó, Krassimir Georgiev, Ágnes Havasi
2018 — conf
Absolute Stability and Implementation of the Two-Times Repeated Richardson Extrapolation Together with Explicit Runge-Kutta Methods.
FDM
Zahari Zlatev, Ivan Dimov, István Faragó, Krassimir Georgiev, Ágnes Havasi
2018 J jnl
Numerical Methods for Advanced Scientific Models: Editorial Introduction.
J. Comput. Appl. Math.
Zahari Zlatev, Pasqua D'Ambra, István Faragó, Imre Fekete
2018 — conf
Sensitivity Analysis of an Air Pollution Model by Using Quasi-Monte Carlo Algorithms for Multidimensional Numerical Integration.
NMA
Tzvetan Ostromsky, Ivan Dimov, Venelin Todorov, Zahari Zlatev
2018 — conf
Stability Properties of Repeated Richardson Extrapolation Applied Together with Some Implicit Runge-Kutta Methods.
FDM
Zahari Zlatev, Ivan Dimov, István Faragó, Krassimir Georgiev, Ágnes Havasi
2017 J jnl
Numerical algorithms for scientific and engineering applications.
J. Comput. Appl. Math.
Zahari Zlatev, Ivan Dimov, Krassimir Georgiev, Svetozar Margenov
2017 J jnl
Stability of the Richardson Extrapolation combined with some implicit Runge-Kutta methods.
J. Comput. Appl. Math.
Zahari Zlatev, Ivan Dimov, István Faragó, Krassimir Georgiev, Ágnes Havasi
2017 — conf
Using Advanced Mathematical Tools in Complex Studies Related to Climate Changes and High Pollution Levels.
LSSC
Zahari Zlatev, Ivan Dimov, Krassimir Georgiev, Radim Blaheta
2016 J jnl
Efficient numerical methods for large-scale scientific computations: Introduction.
J. Comput. Appl. Math.
Zahari Zlatev, Ivan Dimov, Ivan Lirkov
2016 Misc conf
On the Performance, Scalability and Sensitivity Analysis of a Large Air Pollution Model.
ICCS
Tzvetan Ostromsky, Vassil Alexandrov, Ivan Dimov, Zahari Zlatev
2015 J jnl
Preparing input data for sensitivity analysis of an air pollution model by using high-performance supercomputers and algorithms.
Comput. Math. Appl.
Tzvetan Ostromsky, Ivan Dimov, Vassil Alexandrov, Zahari Zlatev
2015 — conf
Selecting Explicit Runge-Kutta Methods with Improved Stability Properties.
LSSC
Zahari Zlatev, Krassimir Georgiev, Ivan Dimov
2014 J jnl
Application of Richardson extrapolation for multi-dimensional advection equations.
Comput. Math. Appl.
Zahari Zlatev, Ivan Dimov, István Faragó, Krassimir Georgiev, Ágnes Havasi, Tzvetan Ostromsky
2014 J jnl
Efficient algorithms for large scale scientific computations: Introduction.
Comput. Math. Appl.
István Faragó, Krassimir Georgiev, Ágnes Havasi, Zahari Zlatev
2014 J jnl
Studying absolute stability properties of the Richardson Extrapolation combined with explicit Runge-Kutta methods.
Comput. Math. Appl.
Zahari Zlatev, Krassimir Georgiev, Ivan Dimov
2013 J jnl
Advanced algorithms for multidimensional sensitivity studies of large-scale air pollution models based on Sobol sequences.
Comput. Math. Appl.
Ivan Dimov, Rayna Georgieva, Tzvetan Ostromsky, Zahari Zlatev
2013 J jnl
Efficient numerical methods for scientific applications: Introduction.
Comput. Math. Appl.
István Faragó, Krassimir Georgiev, Ágnes Havasi, Zahari Zlatev
2013 J jnl
Influence of climatic changes on pollution levels in the Balkan Peninsula.
Comput. Math. Appl.
Zahari Zlatev, Krassimir Georgiev, Ivan Dimov
2013 — conf
Stability Properties of Explicit Runge-Kutta Methods Combined with Richardson Extrapolation.
LSSC
Zahari Zlatev, Krassimir Georgiev, Ivan Dimov
2013 J jnl
The convergence of diagonally implicit Runge-Kutta methods combined with Richardson extrapolation.
Comput. Math. Appl.
István Faragó, Ágnes Havasi, Zahari Zlatev
2012 — conf
High Performance Computing of Data for a New Sensitivity Analysis Algorithm, Applied in an Air Pollution Model.
NAA
Tzvetan Ostromsky, Ivan Dimov, Rayna Georgieva, Pencho Marinov, Zahari Zlatev
2012 — conf
Variance-Based Sensitivity Analysis of the Unified Danish Eulerian Model According to Variations of Chemical Rates.
NAA
Ivan Dimov, Rayna Georgieva, Tzvetan Ostromsky, Zahari Zlatev
2011 J jnl
Implementation of sparse matrix algorithms in an advection-diffusion-chemistry module.
J. Comput. Appl. Math.
Krassimir Georgiev, Zahari Zlatev
2011 — conf
New Parallel Implementation of an Air Pollution Computer Model - Performance Study on an IBM Blue Gene/P Computer.
LSSC
Krassimir Georgiev, Tzvetan Ostromsky, Zahari Zlatev
2011 — conf
Parallel Computation of Sensitivity Analysis Data for the Danish Eulerian Model.
LSSC
Tzvetan Ostromsky, Ivan Dimov, Rayna Georgieva, Zahari Zlatev
2010 J jnl
Efficient implementation of stable Richardson Extrapolation algorithms.
Comput. Math. Appl.
István Faragó, Ágnes Havasi, Zahari Zlatev
2010 — conf
Richardson Extrapolated Numerical Methods for Treatment of One-Dimensional Advection Equations.
NMA
Zahari Zlatev, Ivan Dimov, István Faragó, Krassimir Georgiev, Ágnes Havasi, Tzvetan Ostromsky
2010 J jnl
Special Issue on Advanced Computational Algorithms: Introduction.
J. Comput. Appl. Math.
István Faragó, Ágnes Havasi, Svetozar Margenov, Zahari Zlatev
2010 — conf
Specialized Sparse Matrices Solver in the Chemical Part of an Environmental Model.
NMA
Krassimir Georgiev, Zahari Zlatev
2010 J jnl
Stability of the Richardson Extrapolation applied together with the θ-method.
J. Comput. Appl. Math.
Zahari Zlatev, István Faragó, Ágnes Havasi
2010 J jnl
Studying the sensitivity of pollutants' concentrations caused by variations of chemical rates.
J. Comput. Appl. Math.
Ivan Dimov, Rayna Georgieva, Sofiya Ivanovska, Tzvetan Ostromsky, Zahari Zlatev
2009 — conf
On Some Stability Properties of the Richardson Extrapolation Applied Together with the
LSSC
Zahari Zlatev, István Faragó, Ágnes Havasi
2009 — conf
Runs of UNI-DEM Model on IBM Blue Gene/P Computer and Analysis of the Model Performance.
LSSC
Krassimir Georgiev, Zahari Zlatev
2009 — conf
Sensitivity Analysis of a Large-Scale Air Pollution Model: Numerical Aspects and a Highly Parallel Implementation.
LSSC
Tzvetan Ostromsky, Ivan Dimov, Rayna Georgieva, Zahari Zlatev
2008 J jnl
Development of a data assimilation algorithm.
Comput. Math. Appl.
Per Grove Thomsen, Zahari Zlatev
2008 — ch.
Environmental Science Computing.
Wiley Encyclopedia of Computer Science and Engineering
Zahari Zlatev
2008 — conf
Parallel Performance and Scalability Experiments with the Danish Eulerian Model on the EPCC Supercomputers.
NAA
Tzvetan Ostromsky, Ivan Dimov, Zahari Zlatev
2008 J jnl
Special issue on advanced numerical algorithms for large-scale computations: Introduction.
Comput. Math. Appl.
István Faragó, Ágnes Havasi, Zahari Zlatev
2008 J jnl
Special section: Applications of distributed and grid computing.
Future Gener. Comput. Syst.
Ivan Dimov, Jack J. Dongarra, Kaj Madsen, Jerzy Wasniewski, Zahari Zlatev
2007 J jnl
Editorial introduction to the special issue on computational linear algebra and sparse matrix computations.
Appl. Algebra Eng. Commun. Comput.
Jerzy Wasniewski, Jack J. Dongarra, Kaj Madsen, Sivan Toledo, Zahari Zlatev
2007 — conf
Effective Indices for Emissions from Road Transport.
LSSC
Kostadin Ganev, Dimiter Syrakov, Zahari Zlatev
2007 — conf
Parallelization of Advection-Diffusion-Chemistry Modules.
LSSC
István Faragó, Krassimir Georgiev, Zahari Zlatev
2007 J jnl
Testing the accuracy of a data assimilation algorithm.
Int. J. Comput. Sci. Eng.
Zahari Zlatev, Jørgen Brandt
2006 — conf
A Parallel Architecture for Radix-2 Fast Fourier Transform.
John Vincent Atanasoff Symposium
Philcho Philipov, Vladimir Lazarov, Zahari Zlatev, M. Ivanova
2006 — conf
On Some Computational Aspects of the Variational Data Assimilation Techniques.
Numerical Methods and Applications
Zahari Zlatev
2006 — conf
Parallel and GRID Implementation of a Large Scale Air Pollution Model.
Numerical Methods and Applications
Tzvetan Ostromsky, Zahari Zlatev
2006 — conf
Studying the Properties of Variational Data Assimilation Methods by Applying a Set of Test-Examples.
Numerical Methods and Applications
Per Grove Thomsen, Zahari Zlatev
2005 — conf
Parallel Treatment of General Sparse Matrices.
LSSC
Zahari Zlatev
2005 — conf
Testing Variational Data Assimilation Modules.
LSSC
Zahari Zlatev, Jørgen Brandt
2004 — conf
Large-Scale Computations with the Unified Danish Eulerian Model.
PARA
Zahari Zlatev
2004 J jnl
Operator splitting and commutativity analysis in the Danish Eulerian Model.
Math. Comput. Simul.
Ivan T. Dimov, István Faragó, Ágnes Havasi, Zahari Zlatev
2004 — conf
Parallel Implementation and One Year Experiments with the Danish Eulerian Model.
NAA
Tzvetan Ostromsky, Ivan Dimov, Zahari Zlatev
2004 J jnl
Parallel runs of a large air pollution model on a grid of Sun computers.
Math. Comput. Simul.
Vassil N. Alexandrov, Wojciech Owczarz, Per Grove Thomsen, Zahari Zlatev
2004 — conf
Treatment of Large Scientific Problems: An Introduction.
PARA
Zahari Zlatev, Krassimir Georgiev
2004 Misc conf
Using Parallel Monte Carlo Methods in Large-Scale Air Pollution Modelling.
International Conference on Computational Science
Vassil N. Alexandrov, Zahari Zlatev
2003 — conf
Comparison of Two Local Refinement Methods for Large Scale Air Pollution Simulations.
LSSC
Anton Antonov, Krassimir Georgiev, Emilia Komsalova, Zahari Zlatev
2003 Misc conf
Comprehensive Air Pollution Studies with the Unified Danish Eulerian Model.
PPAM
Zahari Zlatev
2003 — ed.
Numerical Methods and Applications, 5th International Conference, NMA 2002, Borovets, Bulgaria, August 20-24, 2002, Revised Papers
NMA
Ivan Dimov, Ivan Lirkov, Svetozar Margenov, Zahari Zlatev
2003 — conf
Parallel Solution of Very Large Sparse Systems of Linear Algebraic Equations.
LSSC
Zahari Zlatev
2003 — conf
Studying High Ozine Levels in Bulgaria and Europe.
LSSC
Zahari Zlatev, Dimiter Syrakov
2002 — conf
Comparison of Ten Methods for the Solution of Large and Sparse Linear Algebraic Systems.
Numerical Methods and Application
Kyle A. Gallivan, Ahmed H. Sameh, Zahari Zlatev
2002 — conf
Flexible Two-Level Parallel Implementations of a Large Air Pollution Model.
Numerical Methods and Application
Tzvetan Ostromsky, Zahari Zlatev
2002 — conf
Implementation of Bilinear Nonconforming Finite Elements in an Eulerian Air Pollution Model: Results Obtained by Using the Rotational Test.
Numerical Methods and Application
Anton Antonov, Krassimir Georgiev, Emilia Komsalova, Zahari Zlatev
2002 J jnl
Parallel matrix computations in air pollution modelling.
Parallel Comput.
Wojciech Owczarz, Zahari Zlatev
2001 A conf
Computational challenges in large-scale air pollution modelling.
ICS
Tzvetan Ostromsky, Wojciech Owczarz, Zahari Zlatev
2001 Misc conf
Efficient Treatment of Large-Scale Air Pollution Models on Supercomputers.
International Conference on Computational Science (2)
Zahari Zlatev
2001 — conf
Fine-Grid Resolution in Danish Eulerian Model and an Implementation on SGI Origin 2000 Computer.
LSSC
Krassimir Georgiev, Zahari Zlatev
2001 — conf
Parallel Implementation of a Large-Scale 3-D Air Pollution Model.
LSSC
Tzvetan Ostromsky, Zahari Zlatev
2001 — conf
Time-Integration Algorithms for the Computer Treatment of the Horizontal Advection in Air Pollution Models.
LSSC
Zahari Zlatev
2000 — conf
Estimation of the Wheat Losses Caused by the Tropospheric Ozone in Bulgaria and Denmark.
NAA
Tzvetan Ostromsky, Ivan Dimov, Ilia Tzvetanov, Zahari Zlatev
2000 J jnl
Numerical modelling of transport, dispersion, and deposition - validation against ETEX-1, ETEX-2 and Chernobyl.
Environ. Model. Softw.
Jørgen Brandt, Jesper H. Christensen, Lise M. Frohn, Zahari Zlatev
1999 — conf
Application of Special Sparse Solvers in the Chemical Part of Air Pollution Models.
LSSC
Zahari Zlatev
1999 — conf
Economical Estimation of the Losses of Crops Due to High Ozone Levels.
LSSC
Ivan Dimov, Tzvetan Ostromsky, Ilia Tzvetanov, Zahari Zlatev
1999 J jnl
Parallel Sparse Matrix Algorithms for Air Pollution Models.
Parallel Distributed Comput. Pract.
Krassimir Georgiev, Zahari Zlatev
1999 — conf
Some Numerical Experiments with the Parallel Version of the Two-Dimensional Danish Eulerian Model.
LSSC
Krassimir Georgiev, Zahari Zlatev
1998 J jnl
A Coarse-Grained Parallel
Parallel Comput.
Tzvetan Ostromsky, Per Christian Hansen, Zahari Zlatev
1998 — conf
Running an Advection-Chemistry Code on Message Passing Computers.
PVM/MPI
Krassimir Georgiev, Zahari Zlatev
1997 — conf
Application of Sparse Matrix Techniques in the Chemical Part of a Large Air Pollution Model.
LSSC
Tzvetan Ostromsky, Zahari Zlatev
1997 — conf
Efficient Algorithms for the Chemical Part of Large Air Pollution Models.
LSSC
Jørgen Brandt, Zahari Zlatev
1997 — conf
Generalized Model of a Massively Parallel Computer.
LSSC
M. Georgieva, Vladimir Lazarov, D. Petrov, Philcho Philipov, M. Ivanova, Zahari Zlatev
1997 — conf
Long-Range Transport of Air Pollutants and Source-Receptor Relation.
LSSC
Ivan Dimov, Krassimir Georgiev, Zahari Zlatev
1997 — conf
Running Large-Scale Air Pollution Models on Message Passing Machines.
PVM/MPI
Claus Bendtsen, Zahari Zlatev
1997 — conf
Studying Long-Range Transport from Accidental Nuclear Releases by Mathematical Models.
LSSC
Jørgen Brandt, Zahari Zlatev
1997 — conf
Testing the Sensitivity of Air Pollution Levels to Variations of Some Chemical Rate Constants.
LSSC
Ivan Dimov, Zahari Zlatev
1996 — conf
Coupling the Advection and the Chemical Parts of Large Air Pollution Models.
PARA
Jørgen Brandt, Ivan Dimov, Krassimir Georgiev, Jerzy Wasniewski, Zahari Zlatev
1996 — conf
Exploiting the Natural Partitioning in the Numerical Solution of ODE Systems Arising in Atmospheric Chemistry.
WNAA
Stig Skelboe, Zahari Zlatev
1996 — conf
Parallel Solution of Sparse Problems by Using a Sequence of Large Dense Blocks.
PARA
Tzvetan Ostromsky, Stefano Salvini, Jerzy Wasniewski, Zahari Zlatev
1996 — conf
Treatment of Large Air Pollution Models.
WNAA
Jørgen Brandt, Jesper H. Christensen, Ivan Dimov, Krassimir Georgiev, I. Uria, Zahari Zlatev
1996 — conf
Using Dense Matrix Computations in the Solution of Sparse Problems.
WNAA
Tzvetan Ostromsky, Zahari Zlatev
1995 — conf
A Parallel Sparse
PARA
Tzvetan Ostromsky, Per Christian Hansen, Zahari Zlatev
1995 — conf
Comparison of Parallel Computers Using Air Pollution Models.
PP
John Brown, Per Christian Hansen, P. Kaae, C. Keable, Wojciech Owczarz, Jerzy Wasniewski, Zahari Zlatev
1995 J jnl
Locally Optimized Reordering Algorithm and its Application to a Parallel Sparse Linear System Solver.
Computing
Kyle A. Gallivan, Per Christian Hansen, Tzvetan Ostromsky, Zahari Zlatev
1995 — conf
Parallel Computations with Large Atmospheric Models.
PARA
Zahari Zlatev, Ivan Dimov, Krassimir Georgiev, Jerzy Wasniewski
1995 J jnl
Running Air Pollution Models on Massively Parallel Machines.
Parallel Comput.
John Brown, Jerzy Wasniewski, Zahari Zlatev
1995 — conf
Three-Dimensional Version of the Danish Eulerian Model.
PARA
Ivan Dimov, Krassimir Georgiev, Jerzy Wasniewski, Zahari Zlatev
1994 — conf
Comparison of Massively Parallel SIMD Computers Using Air Pollution Models.
PARA
John Brown, Per Christian Hansen, Jerzy Wasniewski, Zahari Zlatev
1994 — conf
PARASPAR: Parallel Solvers for Sparse Linear Algebraic Systems.
PARA
Zahari Zlatev, Jerzy Wasniewski
1994 — conf
PVM Implementations of Advection-Chemistry Modules of Air Pollution Models.
PARA
Bjarne Stig Andersen, P. Kaae, C. Keable, Wojciech Owczarz, Jerzy Wasniewski, Zahari Zlatev
1994 — conf
Two Enhancements in a Partitioned Sparse Code.
PARA
Per Christian Hansen, Tzvetan Ostromsky, Zahari Zlatev
1990 A conf
Solving general sparse linear systems using conjugate gradient-type methods.
ICS
Kyle A. Gallivan, Ahmed H. Sameh, Zahari Zlatev
1988 J jnl
Computations with symmetric, positive definite and band matrices on a parallel vector processor.
Parallel Comput.
Zahari Zlatev, Phuong Vu, Jerzy Wasniewski, Kjeld Schaumburg
1988 J jnl
Treatment of some mathematical models describing long-range transport of air pollutants on vector processors.
Parallel Comput.
Zahari Zlatev
1983 J jnl
Consistency and convergence of general linear multistep variable stepsize variable formula methods.
Computing
Zahari Zlatev
1983 — book
Direct Methods for Sparse Matrices
Ole Østerby, Zahari Zlatev
1982 J jnl
A method for reduction of the storage requirement by the use of some special computer facilities; application to linear systems of algebraic equations.
Comput. Chem.
Jerzy Wasniewski, Zahari Zlatev, Kjeld Schaumburg
1981 J jnl
A testing scheme for subroutines solving large linear problems.
Comput. Chem.
Zahari Zlatev, Kjeld Schaumburg, Jerzy Wasniewski
1981 — book
Y12M - Solution of Large and Sparse Systems of Linear Algebraic Equations
Zahari Zlatev, Jerzy Wasniewski, Kjeld Schaumburg
1980 J jnl
Classification of the systems of ordinary differential equations and practical aspects in the numerical integration of large systems.
Comput. Chem.
Kjeld Schaumburg, Jerzy Wasniewski, Zahari Zlatev
1980 J jnl
Implementation of an iterative refinement option in a code for large and sparse systems.
Comput. Chem.
Zahari Zlatev, Kjeld Schaumburg, Jerzy Wasniewski
1980 J jnl
The use of sparse matrix technique in the numerical integration of stiff systems of linear ordinary differential equations.
Comput. Chem.
Kjeld Schaumburg, Jerzy Wasniewski, Zahari Zlatev
1979 J jnl
Automatic Solution of Differential Equations Based on the User of Linear Multistep Methods.
ACM Trans. Math. Softw.
Zahari Zlatev, Per Grove Thomsen
1979 J jnl
Solution of ordinary differential equations with time dependent coefficients. Development of a semiexplicit Runge-Kutta algorithm and application to a spectroscopic problem.
Comput. Chem.
Kjeld Schaumburg, Jerzy Wasniewski, Zahari Zlatev