Šijakova-Ivanova, T., and L. Robeva Čukovska. “PRELIMINARY INVESTIGATIONS OF PARAGONITE IN MARBLES FROM SIVEC, NORTH MACEDONIA”. Geologica Macedonica, Vol. 33, no. 1, June 2019, pp. 53-59, https://js.ugd.edu.mk/index.php/GEOLMAC/article/view/3028.