M. Tošić, D. S. Cvetković-Ilić, and C. Deng, The Moore-Penrose inverse of a linear combination of commuting generalized and hypergeneralized projectors, The Electronic Journal of Linear Algebra, 22 (2011) 1129-1137.
M. Tošić, D. S. Cvetković-Ilić, The invertibility of two matrices and partial orderings, Applied Mathematics and Computation, 218 (2012) 4651-4657.
M. Tošić and D. S. Cvetković-Ilić, The invertibility of the difference and the sum of commuting generalized and hypergeneralizedprojectors, Linear and Multilinear Algebra, 61 (2013) 482-493 (M22).
M. Tošić, Characterizations and the Moore-Penrose inverse of hypergeneralized k-projectors, Bulletin of the Korean Mathematical Society, 51 (2014), No. 2, pp. 501–510.
M. Tošić, On some linear combinations of commuting involutive and idempotent matrices, Applied Mathematics and Computation, 233 (2014) 103-108.
M. Mišić, M. Tošić, Z. J. Popović, Generalized inverses of a linear combination of Moore-Penrose Hermitian matrices, accepted, http://journal.pmf.ni.ac.rs/filomat/filomat/issue/view/6.