GUSTAFSON, William H. Group Rings of Finite Representation Type. MATHEMATICA SCANDINAVICA, [S. l.], v. 34, p. 58–60, 1974. DOI: 10.7146/math.scand.a-11505. Disponível em: https://tidsskrift.dk/math/article/view/11505. Acesso em: 14 aug. 2026.