STØRMER, E. Separable states and positive maps II. MATHEMATICA SCANDINAVICA, [S. l.], v. 105, n. 2, p. 188–198, 2009. DOI: 10.7146/math.scand.a-15114. Disponível em: https://www.mscand.dk/article/view/15114. Acesso em: 7 apr. 2025.