[1]
B. Y. Levin and L. Y. Mirochnik, “Estimation of the solutions of the Sturm-Liouville equation”, Ukr. Mat. Zhurn., vol. 46, no. 3, pp. 244–278, Mar. 1994, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5760