Silica veins in gaj-lazine locality (Central Serbia) as gemstone. Geologica Macedonica, [S. l.], v. 28, n. 2, p. pp. 185–192, 2014. Disponível em: https://js.ugd.edu.mk/index.php/GEOLMAC/article/view/925. Acesso em: 4 nov. 2025.