MRUCZEK-NASIENIEWSKA, K. Externally compatible Abelian groups of the type (2,1,0). Logic and Logical Philosophy, [S. l.], v. 15, n. 3, p. 239–250, 2007. DOI: 10.12775/LLP.2006.014. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2006.014. Acesso em: 25 jul. 2024.