PalyutkinV. G. (1996) “Distribution of eigenvalues of the Sturm-Liouville problem with slowly increasing potential”, Ukrains’kyi Matematychnyi Zhurnal, 48(6), pp. 813-825. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5281 (Accessed: 24November2024).