BEHNCKE, H.; BÖS, W. JB algebras with an exceptional ideal. MATHEMATICA SCANDINAVICA, [S. l.], v. 42, p. 306–312, 1978. DOI: 10.7146/math.scand.a-11755. Disponível em: https://tidsskrift.dk/math/article/view/11755. Acesso em: 14 aug. 2026.