Boev, I., Tasev, G., Serafimovski, D., & Boev, B. (2019). VOLCANIC ACTIVITY IN THE KOŽUF MOUNTAIN AREA AND IMPLICATIONS FOR THE DISTRIBUTION OF RARE EARTH ELEMENTS IN DIATOMITE AND TRIDYMITE. Geologica Macedonica, 33(1), 5-24. Retrieved from https://js.ugd.edu.mk/index.php/GEOLMAC/article/view/3025