Тимків, Іван Романович. “PROBLEM WITH TWO-POINTS CONDITIONS FOR SYSTEM PARABOLIC EQUATIONS OF SECOND ORDER ON TIME”. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, no. 1(33), Feb. 2019, pp. 124-38, https://pvntsh.nung.edu.ua/index.php/number/article/view/109.