Ospanov, K. N. and Akhmetkaliyeva, R. D. (2015) “Some Inequalities for Second Order Differential Operators with Unbounded Drift”, Eurasian Mathematical Journal, 6(2), pp. 63–74. Available at: https://emj.enu.kz/index.php/main/article/view/608 (Accessed: 19 September 2025).