G.AYYAPPAN. Oscillation criteria of third order nonlinear neutral difference equations. Malaya Journal of Matematik, India, v. 3, n. 02, p. 216–223, 2015. DOI: 10.26637/mjm302/013. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/470. Acesso em: 14 aug. 2024.