Oscillation and nonoscillation of second order half-linear differential equations. Neliniini Kolyvannya, [S. l.], v. 15, n. 3, p. 344–353, 2012. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/656. Acesso em: 6 dec. 2025.