Kulbay, M. N., B. G. Mukanova, and D. K. Suisinbayev. 2018. “Numerical Method of Solving Inverse Problem to Diffusion Equation With Nonlocal Boundary Condition”. Journal of Mathematics, Mechanics and Computer Science 84 (1):67-76. https://bm.kaznu.kz/index.php/kaznu/article/view/425.