ARUL, R.; MANI, M. Oscillation and Nonoscillation of Fourth-order Nonlinear Neutral Differential Equations with "Maxima". JOURNAL OF ADVANCES IN MATHEMATICS, [S. l.], v. 9, n. 2, p. 1931–1937, 2014. DOI: 10.24297/jam.v9i2.7268. Disponível em: https://rajpub.com/index.php/jam/article/view/7268. Acesso em: 23 dec. 2024.