Symotyuk, M.M., and I.R. Tymkiv. “Problem With Two-Point Conditions for Parabolic Equation of Second Order on Time”. Carpathian Mathematical Publications 6, no. 2 (December 28, 2014): 351–359. Accessed May 6, 2024. https://scijournals.pnu.edu.ua/index.php/cmp/article/view/1367.