DAHL, Erlend. Cohomology cyclique des products croisés tordus. MATHEMATICA SCANDINAVICA, [S. l.], v. 78, p. 255–265, 1996. DOI: 10.7146/math.scand.a-12587. Disponível em: https://tidsskrift.dk/math/article/view/12587. Acesso em: 14 aug. 2026.