А.Sh. Shaldanbayev, А.А. Shaldanbayevа, & B.А. Shaldanbay. (2019). ON SQUARE ROOT OF STURM-LIUVILLE OPERATOR. Известия НАН РК. Серия физико-математическая, (3), 97–113. извлечено от https://journals.nauka-nanrk.kz/physics-mathematics/article/view/1640