Савчук, Ярослав Іванович. “STRUCTURE OF IMPERFECT VECTORS FOR THE ADDED WHOLE CURVES”. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, no. 1(9), Mar. 2019, pp. 46-50, https://pvntsh.nung.edu.ua/index.php/number/article/view/284.