SCHLICHTKRULL, H. One-dimensional $K$-types in finite dimensional representations of semisimple Lie groups: A generalization of Helgason’s theorem. MATHEMATICA SCANDINAVICA, [S. l.], v. 54, p. 279–294, 1984. DOI: 10.7146/math.scand.a-12059. Disponível em: https://www.mscand.dk/article/view/12059. Acesso em: 4 may. 2024.