DIECKMANN, G. Korovkin theory in liminal JB-algebras. MATHEMATICA SCANDINAVICA, [S. l.], v. 81, p. 269–282, 1997. DOI: 10.7146/math.scand.a-12880. Disponível em: https://www.mscand.dk/article/view/12880. Acesso em: 4 may. 2024.