Song, Seok-Zun; Kang, Kyung-Tae; Jun, Young-Bae: Rank-preserving operators of nonnegative integer matrices. (English). - [J] Commun. Korean Math. Soc. 20, No. 4, 671-683 (2005). [ISSN 1225-1763]Kuzma, Bojan (Avtor) matematikalinearna algebraohranjevalec ranga20062013-10-15 12:06:41Delo ni kategorizirano2025sl