PON SUNDAR; B.KISHOKKUMAR; K. REVATHI. Oscillation theorems for certain delay difference inequalities. Malaya Journal of Matematik, India, v. 6, n. 01, p. 41–48, 2018. DOI: 10.26637/MJM0601/0006. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/769. Acesso em: 5 nov. 2024.