TIEŠIS, Vytautas. The infection spread model among grouped drug users. Lietuvos matematikos rinkinys, [S. l.], v. 39, n. III, p. 453–457 , 1999. DOI: 10.15388/LMD.1999.35693. Disponível em: https://www.journals.vu.lt/LMR/article/view/35693.. Acesso em: 21 nov. 2024.