Asymptotic representations of rapidly varying solutions of essentially nonlinear differential equations of the second order. Neliniini Kolyvannya, [S. l.], v. 20, n. 3, p. 328–345, 2017. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/871. Acesso em: 8 dec. 2025.