JONAS, P. A class of operator-valued meromorphic functions on the unit disc. Annales Fennici Mathematici, [S. l.], v. 17, n. 2, p. 257–284, 1992. DOI: 10.5186/aasfm.1992.1727. Disponível em: https://afm.journal.fi/article/view/134756. Acesso em: 4 may. 2024.