JACOBSEN, Jacob; STETKAER, Henrik. Eigenspace representations of nilpotent lie groups. Mathematica Scandinavica, Berkeley, CA, United States, v. 48, p. 41–55, 1981. DOI: 10.7146/math.scand.a-11897. Disponível em: https://journals.msp.org/mscand/article/view/1731. Acesso em: 25 jul. 2026.