KHAN, Mumtaz Ahmad; SALAMA ABUKHAMMASH, Ghazi. On a generalization of Appell*s functions of two variables. Pro Mathematica, [S. l.], v. 16, n. 31-32, p. 61–83, 2002. Disponível em: https://revistas.pucp.edu.pe/index.php/promathematica/article/view/8183. Acesso em: 24 dic. 2025.