Kaygusuz, A., and D. Selvi. “Crystallization Conditions and Petrography of Eocene Volcanic Rocks in the Gumusdamla-Erikdibi Area (Bayburt, NE Turkey)”. Journal of Engineering Research and Applied Science, Vol. 9, no. 2, Dec. 2020, pp. 1529-37, http://www.journaleras.com/index.php/jeras/article/view/217.