Nykyforchyn, O. R., K. M. Koporkh, and Nykorovych S. І. “COMPACT ULTRAPSEUDOMETRICS AND INVERSE SYSTEMS”. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, no. 17(64) (November 22, 2022): 65–74. Accessed April 19, 2024. https://pvntsh.nung.edu.ua/index.php/number/article/view/1805.