GECHE, F. I. On a class of entire functions of many variables. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 18, n. 3, p. 13–27, 1966. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8733. Acesso em: 5 dec. 2025.