Naumov, Borislav, and Ljiljana Tomović. 2006. “A Review of Distribution and Conservation Status of <em>Zamenis situla</Em> (Linnaeus, 1758) (Reptilia: Colubridae) in Bulgaria”. Acta Herpetologica 2 (1):7-10. https://doi.org/10.13128/Acta_Herpetol-1880.