МАНДРИК, Ярослав Іванович. IVANO-FRANKIVSK NATIONAL TECHNICAL UNIVERSITY OF OIL AND GAS – 50 YEARS. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, [S. l.], n. 2(38), p. 301–320, 2019. Disponível em: https://pvntsh.nung.edu.ua/index.php/number/article/view/56. Acesso em: 11 apr. 2025.