[1]
B. A. Aliev, “Asymptotic behavior of the eigenvalues of a boundary-value problem for a second-order elliptic operator-differential equation”, Ukr. Mat. Zhurn., vol. 58, no. 8, pp. 1146–1152, Aug. 2006, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3519