List of publications:

• N. Kosturski, S. Margenov, Y. Vutov: Non-Overlapping Domain Decomposition via BURA Preconditioning of the Schur Complement, Mathematics 2022, 10(13), 2327.
• S. Harizanov, N. Kosturski, I. Lirkov, S. Margenov, Y. Vutov: Reduced Sum Implementation of the BURA Method for Spectral Fractional Diffusion Problems, Large-Scale Scientific Computations 2021, Springer LNCS 13127, pp. 284-291.
• S. Harizanov, N. Kosturski, I. Lirkov, S. Margenov, Y. Vutov: Reduced Multiplicative (BURA-MR) and Additive (BURA-AR) Best Uniform Rational Approximation Methods and Algorithms for Fractional Elliptic Equations, Fractal Fract. 2021, 5, 61.
• S. Harizanov, N. Kosturski, S. Margenov, Y. Vutov: Neumann fractional diffusion problems: BURA solution methods and algorithms, Mathematics and Computers in Simulation 189, pp. 85-98.
• G. Bencheva, N. Kosturski, Y. Vutov: Parallel BURA Based Numerical Solution of Fractional Laplacian with Pure Neumann Boundary Conditions, Large-Scale Scientific Computations 2019, Springer LNCS 11958, pp. 284-291.
• N. Kosturski, S. Margenov, Y. Vutov: Performance Analysis of MG Preconditioning on Intel Xeon Phi: Towards Scalability for Extreme Scale Problems with Fractional Laplacians, Large-Scale Scientific Computations 2017, Springer LNCS 10665, pp. 304-312.
• S. Harizanov, S. Margenov, P. Marinov, Y. Vutov, Volume constrained 2-phase segmentation method for utilizing a linear system solver based on the best uniform polynomial approximation of x^{-1/2}, Journal of Computational and Applied Mathematics. [2016] [web]
• I. Georgiev, S. Harizanov, Y. Vutov, Supervised 2-Phase Segmentation of Porous Media with Known Porosity, LSSC 2015, LNCS 9374, 343-351, Springer International Publishing Switzerland, [2015] [web]
• I. Georgiev, S. Harizanov and Y. Vutov Supervised 2-phase Segmentation of Porous Media with Known Porosity LSSC 2015, LNCS 9374, pp. 335-342 [2015] [pdf]
• N. Kosturski, I. Lirkov, S. Margenov and Yavor Vutov, Thermoelectrical Tick Removal Process Modeling LSSC 2015, LNCS 9374, pp. 360-367 [2015] [pdf]
• N. Kosturski, S. Margenov, P. Popov, N. Simeonov, Y. Vutov, Performance Analysis of Block AMG Preconditioning of Poroelasticity Equations LSSC 2015, LNCS 9374, pp. 368-375 [2015] [pdf]
• K. Georgiev, N. Kosturski, and Y. Vutov, On the Adaptive Time-Stepping in Radio-Frequency Liver Ablation Simulation: Some Preliminary Results, LSSC 2013, LNCS 8353, pp. 397-404 [2014] [pdf]
• N. Kosturski, S. Margenov, and Y. Vutov, Calibration of Parameters for Radio-Frequency Ablation Simulation, LSSC 2013, LNCS 8353, pp. 611-618 [2014] [pdf]
• S. Margenov, S. Stoykov, Y. Vutov, Numerical Homogenization of Heterogeneous Anisotropic Linear Elastic Materials, LSSC 2013, LNCS 8353, pp. 347-354 [2014] [pdf]
• N. Kosturski, S. Margenov, and Y. Vutov, Computer simulation of RF liver ablation on an MRI scan data , AIP Conf. Proc. 1487, pp. 120-126 [2012] [pdf] [web]
• N. Kosturski, S. Margenov, and Y. Vutov, Improving the Efficiency of Parallel FEM Simulations on Voxel Domains, LSSC 2011, LNCS 7116, pp. 574-581, [2012] [pdf] [web]
• N. Kosturski, S. Margenov, Y. Vutov, Balancing the Communications and Computations in Parallel FEM Simulations on Unstructured Grids, R. Wyrzykowski et al. (Eds.): PPAM 2011, Part II, LNCS 7204, pp. 211–220, [2012] [pdf] [web]
• N. Kosturski, S. Margenov, and Y. Vutov, Comparison of Two Techniques for Radio-frequency Hepatic Tumor Ablation through Numerical Simulation, AIP Conf. Proc. 1404, 431, DOI:10.1063/1.3659945, SJR Index: 0.033 , [2011] [pdf] [web]
• P. Popov, Y. Vutov, S. Margenov, O. Iliev, Finite volume discretization of equations describing nonlinear diffusion in Li-Ion batteries, LNCS 6046, Springer-Verlag, Berlin, Heidelberg, pp. 338-346, SJR Index: 0.034, [2011] [pdf] [web]
• Ivan Lirkov, Yavor Vutov, Marcin Paprzycki, Maria Ganzha, Parallel Performance Evaluation of MIC(0) Preconditioning Algorithm for Voxel μFE Simulation, Parallel processing and applied mathematics, Part II, R. Wyrzykowski, J. Dongarra, K. Karczewski, J. Waśniewski eds., Lecture notes in computer science, 6068, Springer, pp.135-144, [2010] [pdf] [web]
• Svetozar Margenov and Yavor Vutov, Parallel MIC(0) Preconditioning for Numerical Upscaling of Anisotropic Linear Elastic Materials, Large-Scale Scientific Computing, I. Lirkov, S. Margenov, J. Waśniewski eds., Lecture notes in computer sciences, 5910, Springer, pp. 805-812, [2010] [pdf] [web]
• Ivan Lirkov, Yavor Vutov, Marcin Paprzycki, and Maria Ganzha, Comparative Analysis of High Performance Solvers for 3D Elasticity Problems, Numerical Analysis and Its Applications, S. Margenov, L. Vulkov, J. Waśniewski eds., Lecture notes in computer science, 5434, Springer, 392-399, [2009] [pdf] [web]
• Yavor Vutov, Parallel DD-MIC(0) Preconditioning of Nonconforming Rotated Trilinear FEM Elasticity Systems, Lecture Notes in Computer Science, Volume 4818/2008, 745-752, [2008] [pdf] [web]
• P. Arbenz, S. Margenov, Y. Vutov, Parallel MIC(0) preconditioning of 3D elliptic problems discretized by Rannacher-Turek finite elements, Computers and Mathematics with Applications, 55 (10), 2197-2211, [2008] [pdf] [web]
• S. Margenov, Y. Vutov, Preconditioning of Voxel FEM Elliptic Systems, TASK, Quaterly, 11, No 1-2, 117-128, [2007] [pdf] [web]
• Ivan Lirkov, Yavor Vutov, Marcin Paprzycki, Maria Ganzha, Benchmarking Performance Analysis of Parallel Solver for 3D Elasticity Problems, Large-Scale Scientific Computing, I. Lirkov, S. Margenov, J. Waśniewski eds., Lecture notes in computer science, 4818, Springer, 705-712, [2008] [pdf] [web]
• S. Margenov, Y. Vutov, Parallel PCG algorithms for voxel FEM elasticity systems, Proceedings of the International Multiconference on Computer Science and Information Technology, Wisla, Vol. 2, 379-385, [2007] [pdf] [web]
• Ivan Lirkov, Yavor Vutov, Comparative Analysis of High Performance Solvers for 3D Elliptic Problems, Proceedings of the International Multiconference on Computer Science and Information Technology, Volume 2, M. Ganzha, M. Paprzycki, T. Pełech-Pilichowski eds., 483-492, [2007] [pdf] [web]
• Ivan Lirkov and Yavor Vutov, The convergence rate and parallel performance of a 3D elliptic solver, Systems science, 32, No. 4, 73-81, [2007] [pdf] [web]
• S. Margenov, Y. Vutov, Comparative analysis of PCG solvers for voxel FEM systems, Proceedings of the International Multiconference on Computer Science and Information Technology, Wisla, 591-598, [2006] [pdf] [web]
• Yavor Vutov, Parallel Incomplete Factorization of 3D NC FEM Elliptic Systems, Lecture Notes in Computer Science, Volume 4310/2007, 114-121, [2007] [pdf] [web]
• Ivan Lirkov and Yavor Vutov, Parallel Performance of a 3D Elliptic Solver, Proceedings of the International Multiconference on Computer Science and Information Technology, Volume 1, M. Ganzha, M. Paprzycki, J. Wachowicz, K. Węcel eds., (CD-ROM), ISSN 1896-7094, 579-590, [2006] [pdf] [web]