Vukov, Milenko, Istvan Forizs, and Mihovil Logar. 1997. “Magmatski Epidot Željina (Centralna Srbija)”. Geološki Anali Balkanskoga Poluostrva 61 (2), 401-17. https://gabp.rgf.bg.ac.rs/index.php/gabp/article/view/385.