On the action of differentiation operator in some classes of Nevanlinna-Djrbashian type in the unit disk and polydisk. Armenian Journal of Mathematics, [S. l.], v. 2, n. 4, p. 120–134, 2009. Disponível em: https://armjmath.sci.am/index.php/ajm/article/view/60.. Acesso em: 7 may. 2024.