DUNG, Nguyen V.; SMITH, P. F. Hereditary CS-Modules. Mathematica Scandinavica, Berkeley, CA, United States, v. 71, p. 173–180, 1992. DOI: 10.7146/math.scand.a-12420. Disponível em: https://journals.msp.org/mscand/article/view/1234. Acesso em: 24 jul. 2026.