Asymptotic representations of a certain class of solutions of essentially nonlinear second order differential equations. Neliniini Kolyvannya, [S. l.], v. 9, n. 4, p. 490–501, 2006. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/410. Acesso em: 21 jan. 2026.