ŠVITRA, Donatas; JANUTĖNIENĖ, Jolanta. Linear analysis of equations of process treatment metals. Lietuvos matematikos rinkinys, [S. l.], v. 38, n. II, p. 470–474 , 1998. DOI: 10.15388/LMD.1998.37961. Disponível em: https://www.zurnalai.vu.lt/LMR/article/view/37961. Acesso em: 7 nov. 2025.