DATT, G. On Lappan’s five-valued theorem for $\varphi$-normal functions in several variables. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 9, p. 1284–1290, 2022. DOI: 10.37863/umzh.v74i9.6237. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6237. Acesso em: 11 apr. 2025.