Gičevski, Biljana, Vojo Mirčovski, Slavčo Hristovski, and Metka Petrič. 2024. “NATURAL TRACERS AS A TOOL FOR UNDERSTANDING THE FUNCTIONING OF THE KARST SYSTEM AND ITS VULNERABILITY - A CASE STUDY OF THE MANASTIREC SPRING”. Geologica Macedonica 38 (2), 131-39. https://js.ugd.edu.mk/index.php/GEOLMAC/article/view/6992.