SHOCK, R. On orders in rQF-2 rings. MATHEMATICA SCANDINAVICA, [S. l.], v. 38, p. 192–198, 1976. DOI: 10.7146/math.scand.a-11628. Disponível em: https://www.mscand.dk/article/view/11628. Acesso em: 5 may. 2024.