P. GOPALAKRISHNAN; A. MURUGESAN. Sharp sufficient conditions for oscillation of second-order general noncanonical difference equations. Malaya Journal of Matematik, India, v. 9, n. 01, p. 1141–1146, 2021. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/1238. Acesso em: 16 jul. 2024.