Hakopian, Yu.R., and S.S. Aleksanyan. 2016. “MOORE–PENROSE INVERSE OF BIDIAGONAL MATRICES. III”. Proceedings of the YSU A: Physical and Mathematical Sciences 50 (1 (239). Yerevan, Armenia:12-21. https://doi.org/10.46991/PSYU:A/2016.50.1.012.