Gvozdenović, S. and Čavor, N. 2015. First record of dicephalism in the four-lined snake Elaphe quatuorlineata Lacépède, 1789 (Serpentes: Colubridae) from Montenegro. Natura Sloveniae. 17, 1 (Jun. 2015), 49–50. DOI:https://doi.org/10.14720/ns.17.1.49-50.