NOREDDIN , M. M.; TIKHONENKO , N. Ya. On convergence of the method of orthogonal polynomials of the approximate solution оf the second order integral equations with $\Pi$-kernels. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 43, n. 2, p. 223–229, 2025. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9361. Acesso em: 7 dec. 2025.