1. |
A. Kasym, L. K. Kusainova, “On the separation property of the Sturm–Liouville operator in weighted spaces of multiplicators”, Itogi Nauki i Tekhniki. Sovrem. Mat. Pril. Temat. Obz., 141 (2017), 86–94 ; Journal of Mathematical Sciences, 241:5 (2019), 596–604 |