KOLIHA, J. J. Continuity and differentiability of the Moore-Penrose inverse in $C^*$-algebras. Mathematica Scandinavica, Berkeley, CA, United States, v. 88, n. 1, p. 154–160, 2001. DOI: 10.7146/math.scand.a-14320. Disponível em: https://journals.msp.org/mscand/article/view/885. Acesso em: 24 jul. 2026.