Spasovski, Orce, and Daniel Spasovski. 2015. “Possibilities for Using Travertine from the Nabigori Deposit, Village of Velmej (western Macedonia), As Architectural Stone”. Geologica Macedonica 29 (1), pp. 47-52. https://js.ugd.edu.mk/index.php/GEOLMAC/article/view/1009.