Shawagfeh, N. T. y Glasser, M. L. (2011) «Uniform asymptotic solutions of second order linear differential equations with double pole and turning point», Rev. Téc. Fac. Ing. Univ. Zulia, 13(1). Disponible en: https://produccioncientificaluz.org./index.php/tecnica/article/view/5354 (Accedido: 13abril2025).