GomilkoA. M. and PivovarchikV. N. (2001) “Asymptotics of Solutions of the Sturm–Liouville Equation with Respect to a Parameter”, Ukrains’kyi Matematychnyi Zhurnal, 53(6), pp. 742-757. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4297 (Accessed: 24November2024).