The numerical Range of Matrix Polynomials J. Maroulas, P. Psarrakos (1999) Δελτίο της Ελληνικής Μαθηματικής Εταιρίας
The relational translators of the hyperspherical functional matrix. Letic, Dusko, Cakic, Nenad, Davidovic, Branko (2010) Advances in Difference Equations [electronic only]
To solving multiparameter problems of algebra. 6. Spectral characteristics of polynomial matrices. Kublanovskaya, V.N. (2005) Zapiski Nauchnykh Seminarov POMI
To solving multiparameter problems of algebra. 7. The method of P G - q factorization and its applications. Kublanovskaya, V.N. (2005) Zapiski Nauchnykh Seminarov POMI