EL FARISSI, Abdallah; BELA¨IDI, Benharrat. Oscillation and fixed points of derivatives of solutions of some linear differential equations. MATEMATIKA, [S. l.], v. 30, p. 159–168, 2014. DOI: 10.11113/matematika.v30.n.707. Disponível em: https://matematika.utm.my/index.php/matematika/article/view/707. Acesso em: 22 may. 2024.