SHOUKAKU, Y. Oscillation Theory of First Order Differential Equations with Delay. The Journal of the Indian Mathematical Society, [S. l.], v. 86, n. 3-4, p. 315–324, 2019. DOI: 10.18311/jims/2019/19834. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/19834. Acesso em: 7 may. 2024.