@ARTICLE{
author={Kostadinov Marko V,Krstic Mihailo A,Rajkovic Kostadin P,Petkovic Marko D},
year={2026},
title={Adaptive coefficients iterative method for computing matrix inverse},
journal={LINEAR ALGEBRA AND ITS APPLICATIONS},
volume={731},
number={},
pages={277-305},
document_type={Article},
} 

@ARTICLE{
author={Kostadinov Marko V},
year={2025},
title={A Note on the Perturbations of Pseudospectra of 2 X 2 Upper-Triangular Operator Matrices},
journal={FACTA UNIVERSITATIS-SERIES MATHEMATICS AND INFORMATICS},
volume={40},
number={4},
pages={931-943},
document_type={Article},
} 

@ARTICLE{
author={Kostadinov Marko V},
year={2021},
title={Injectivity of Linear Combinations in B(H)},
journal={ELECTRONIC JOURNAL OF LINEAR ALGEBRA},
volume={37},
number={},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Kostadinov Marko V},
year={2021},
title={Operator matrix representations of the Generalised Bott-Duffin Inverse},
journal={BULLETIN OF THE IRANIAN MATHEMATICAL SOCIETY},
volume={47},
number={2},
pages={523-533},
document_type={Article},
} 

@ARTICLE{
author={Cvetkovic-Ilic Dragana S,Kostadinov Marko V},
year={2019},
title={Consistency in invertibility and Fredholmness of operator matrices},
journal={JOURNAL OF SPECTRAL THEORY},
volume={9},
number={2},
pages={635-649},
document_type={Article},
} 

@ARTICLE{
author={Cvetkovic-Ilic Dragana S,Kostadinov Marko V},
year={2018},
title={Invertibility of linear combinations in B(H)},
journal={LINEAR & MULTILINEAR ALGEBRA},
volume={66},
number={11},
pages={2139-2150},
document_type={Article},
}