Giri, R. et al. 2020. An Unusually Dark Common Trinket Snake, Coelognathus helena (Daudin 1803) (Colubridae), from Nepal . Reptiles & Amphibians. 27, 2 (Jul. 2020), 247–248. DOI:https://doi.org/10.17161/randa.v27i2.14195.