VASYLYK, V. B.; MAKAROV, V. L. Exponentially convergent method for an abstract nonlocal problem with integral nonlinearity. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 68, n. 12, p. 1587–1597, 2016. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1945. Acesso em: 6 dec. 2025.