KATANI, R.; SHAHMORAD, S. The block by block method with Romberg quadrature for solving nonlinear Volterra integral equations on the large intervals. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 64, n. 7, p. 919–931, 2012. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2628. Acesso em: 6 dec. 2025.