KOLIHA, J. J. Continuity and differentiability of the Moore-Penrose inverse in $C^*$-algebras. MATHEMATICA SCANDINAVICA, [S. l.], v. 88, n. 1, p. 154–160, 2001. DOI: 10.7146/math.scand.a-14320. Disponível em: https://tidsskrift.dk/math/article/view/14320. Acesso em: 14 aug. 2026.