Иманбаев, Н. С., and М. А. Садыбеков. “ The Rst Regularized Trace of a Dierential Operator of the Sturm-Liouville Problem on the Segment With Punctured Points”. Journal of Mathematics, Mechanics and Computer Science 81, no. 2 (March 28, 2014): 66–71. Accessed January 7, 2025. https://bm.kaznu.kz/index.php/kaznu/article/view/58.