Boev, B., T. Šijakova-Ivanova, M. Tutkovski, and T. Filov. “Mineralogical Investigation of the Old Episcopal Basilica in the Archeological Locality of Stobi”. Geologica Macedonica, Vol. 30, no. 1, June 2016, pp. pp. 33-, https://js.ugd.edu.mk/index.php/GEOLMAC/article/view/1429.