GILMER, R.; HEINZER, W. Cardinality of generating sets for modules over a commutative ring. MATHEMATICA SCANDINAVICA, [S. l.], v. 52, p. 41–57, 1983. DOI: 10.7146/math.scand.a-11992. Disponível em: https://www.mscand.dk/article/view/11992. Acesso em: 28 apr. 2024.