On the existence of solutions of certain boundary value problems for ordinary differential equations with nonlinearly involved leading derivative. Neliniini Kolyvannya, [S. l.], v. 3, n. 1, p. 49–52, 2000. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/95. Acesso em: 22 jan. 2026.