GULLIKSEN, T. H. On the deviations of a local ring. MATHEMATICA SCANDINAVICA, [S. l.], v. 47, p. 5–20, 1980. DOI: 10.7146/math.scand.a-11872. Disponível em: https://www.mscand.dk/article/view/11872. Acesso em: 6 may. 2024.