APYNIS, Antanas. On application of Cramer’s rule. Lietuvos matematikos rinkinys, [S. l.], v. 52, n. proc. LMS, p. 59–61, 2011. DOI: 10.15388/LMR.2011.me01. Disponível em: https://www.journals.vu.lt/LMR/article/view/15374.. Acesso em: 2 may. 2024.