VELYKOCHYY, VOLODYMYR, SERHIY DEREVJANKO, and PAVLO VYCHIVSKYI. “TO THE 80TH ANNIVERSARY OF PROFESSOR KALAKURA YA.S. AND THE 55TH ANNIVERSARY OF HIS SCIENTIFIC AND PEDAGOGICAL ACTIVITY”. Journal of Vasyl Stefanyk Precarpathian National University 6, no. 2 (June 20, 2019): 133–137. Accessed November 22, 2024. https://vps.pnu.edu.ua/index.php/jpnu/article/view/1885.