A.Sh.Shaldanbayev, A.A.Shaldanbayeva, и B.A.Shaldanbay. «INVERSE PROBLEM OF THE STURM-LIOUVILLE OPERATOR WITH UNSEPARATED BOUNDARY VALUE CONDITIONS AND SYMMETRIC POTENTIAL». Academic Scientific Journal of Computer Science, no. 4 (август 10, 2019): 30–41. просмотрено декабрь 8, 2025. https://journals.nauka-nanrk.kz/physics-mathematics/article/view/1673.