SUND, T. On the structure of solvable Lie algebras. MATHEMATICA SCANDINAVICA, [S. l.], v. 44, p. 235–242, 1979. DOI: 10.7146/math.scand.a-11808. Disponível em: https://www.mscand.dk/article/view/11808. Acesso em: 5 may. 2024.