ZHANG, G.; CHENG, S.-S. ELEMENTARY OSCILLATION CRITERIA FOR A THREE TERM RECURRENCE RELATION WITH OSCILLATORY COEFFICIENT SEQUENCE. Tamkang Journal of Mathematics, [S. l.], v. 29, n. 3, p. 227–232, 1998. DOI: 10.5556/j.tkjm.29.1998.4274. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4274. Acesso em: 29 mar. 2024.