Amirov RK, Güldü Y, Topsakal N. On impulsive Sturm - Liouville operators with singularity and spectral parameter in boundary conditions. Ukr. Mat. Zhurn. [Internet]. 2012Dec.25 [cited 2024Apr.20];64(12):1610-29. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2686