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Djordjevic Dragan S,Koliha JJ,Straskraba I (2009) Factorization of EP elements in C*-algebras, LINEAR & MULTILINEAR ALGEBRA, vol. 57, br. 6, str. 587-594 (Article) 

Mosic Dijana V,Djordjevic Dragan S,Koliha JJ (2009) EP elements in rings, LINEAR ALGEBRA AND ITS APPLICATIONS, vol. 431, br. 5-7, str. 527-535 (Article) 

Cvetkovic-Ilic Dragana S,Dajic Alegra,Koliha JJ (2007) Positive and real-positive solutions to the equation axa* = c in C*-algebras, LINEAR & MULTILINEAR ALGEBRA, vol. 55, br. 6, str. 535-543 (Article) 

Koliha JJ,Djordjevic Dragan S,Cvetkovic-Ilic Dragana S (2007) Moore-Penrose inverse in rings with involution, LINEAR ALGEBRA AND ITS APPLICATIONS, vol. 426, br. 2-3, str. 371-381 (Article) 

Koliha JJ,Rakocevic Vladimir R (2007) Stability theorems for linear combinations of idempotents, INTEGRAL EQUATIONS AND OPERATOR THEORY, vol. 58, br. 4, str. 597-601 (Article) 

Koliha JJ,Rakocevic Vladimir R (2007) Range projections and the Moore-Penrose inverse in rings with involution, LINEAR & MULTILINEAR ALGEBRA, vol. 55, br. 2, str. 103-112 (Article) 

Koliha JJ,Rakocevic Vladimir R (2006) The nullity and rank of linear combinations of idempotent matrices, LINEAR ALGEBRA AND ITS APPLICATIONS, vol. 418, br. 1, str. 11-14 (Article) 

Koliha JJ,Rakocevic Vladimir R (2005) Differentiability of the g-Drazin inverse, STUDIA MATHEMATICA, vol. 168, br. 3, str. 193-201 (Article) 

Koliha JJ,Rakocevic Vladimir R (2005) Fredholm properties of the difference of orthogonal projections in a Hilbert space, INTEGRAL EQUATIONS AND OPERATOR THEORY, vol. 52, br. 1, str. 125-134 (Article) 

Koliha JJ,Rakocevic Vladimir R,Straskraba I (2004) The difference and sum of projectors, LINEAR ALGEBRA AND ITS APPLICATIONS, vol. 388, br. , str. 279-288 (Article) 

Koliha JJ,Rakocevic Vladimir R (2004) On the norm of idempotents in C*-algebras, ROCKY MOUNTAIN JOURNAL OF MATHEMATICS, vol. 34, br. 2, str. 685-697 (Article) 

Koliha JJ,Rakocevic Vladimir R (2003) Invertibility of the difference of idempotents, LINEAR & MULTILINEAR ALGEBRA, vol. 51, br. 1, str. 97-110 (Article) 

Koliha JJ,Rakocevic Vladimir R (2002) Invertibility of the sum of idempotents, LINEAR & MULTILINEAR ALGEBRA, vol. 50, br. 4, str. 285-292 (Article)