1.
Aliev IV. Summability of series in the root functions of boundary-value problems of Bitsadze-Samarskii type. Ukr. Mat. Zhurn. [Internet]. 2008Apr.25 [cited 2024Nov.23];60(4):443–452. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3167