R. ARUL; G. AYYAPPAN. Oscillation criteria for third order neutral difference equations with distributed delay. Malaya Journal of Matematik, India, v. 1, n. 02, p. 1–10, 2013. DOI: 10.26637/mjm102/001. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/344. Acesso em: 16 jul. 2024.