Radonjić, Miloš, and Valeri Sachanski. “First Palaeozoic Phyllocarid Crustaceans and Pterygotid Eurypterids in Serbia”. Proceedings of the Bulgarian Academy of Sciences 76, no. 8 (August 29, 2023): 1243–1250. Accessed October 18, 2026. https://www.proceedings.bas.bg/index.php/cr/article/view/369.