Varga, Andrea, Béla Raucsik, and Tamás Mikes. “The Petrography and Heavy Minerals of the Toarcian Black Shale of the Réka Valley Section of the Mecsek Hills: A Pilot Study”. Földtani Közlöny 139, no. 1 (April 8, 2020): 33-54. Accessed July 11, 2025. https://ojs.mtak.hu/index.php/foldtanikozlony/article/view/2774.