JACOBSEN, Jacob. Eigenspace representations of nilpotent Lie groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 52, p. 321–333, 1983. DOI: 10.7146/math.scand.a-12009. Disponível em: https://tidsskrift.dk/math/article/view/12009. Acesso em: 14 aug. 2026.