“O Dogerskoj (alenskoj) Starosti Povlate Uglja Vrške Čuke (Istočna Srbija): On the Dogger (Aalenian) Age of the Vrška Čuka Coal Overbed, Eastern Serbia”. 1997. Geološki Anali Balkanskoga Poluostrva 61 (2): 139-51. https://gabp.rgf.bg.ac.rs/index.php/gabp/article/view/379.