Кісь, Я. І. “REGIONAL RESEARCHES OF PROFESSOR OF THE LVIV UNIVERSITY Y.P. CIS’ TO 90-ANIVESARY ”. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY Idea, no. 3(3) (June 25, 2019): 167–173. Accessed December 11, 2025. https://pvntsh.nung.edu.ua/index.php/idea/article/view/773.