Dinh . З. (2018). Dinh D˜ung Galerkin approximation for parametric and stochastic elliptic PDEs. Bulletin of L.N. Gumilyov Eurasian National University. Mathematics, Computer Science, Mechanics Series, 122(1), 76–89. Retrieved from https://bulmathmc.enu.kz/index.php/main/article/view/18