VIRCHENKO, N. A.; SICHKAR', Yu, V. On some integral equations with the generalized Legendre function. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 2, p. 263–267, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4607. Acesso em: 5 dec. 2025.