Kopach М.І.; OBSHTA, A.F.; SHUVAR, B.A. Analogues of bilateral Kurpel’s methods for differential equations with aftereffect. Carpathian Mathematical Publications, [S. l.], v. 4, n. 2, p. 268–274, 2012. Disponível em: https://scijournals.pnu.edu.ua/index.php/cmp/article/view/2271. Acesso em: 26 apr. 2024.