EDÉN, Viggo. Distributions Invariant under the Group of Complex Orthogonal Transformations. MATHEMATICA SCANDINAVICA, [S. l.], v. 14, p. 75–89, 1964. DOI: 10.7146/math.scand.a-10707. Disponível em: https://tidsskrift.dk/math/article/view/10707. Acesso em: 13 aug. 2026.