JOHANSSON, Bo I. a high indices theorem without a nontrivial solution. MATHEMATICA SCANDINAVICA, [S. l.], v. 106, n. 1, p. 23–38, 2010. DOI: 10.7146/math.scand.a-15122. Disponível em: https://tidsskrift.dk/math/article/view/15122. Acesso em: 13 aug. 2026.