[1]
K. Maduwage, A. Silva, K. Manamendra-Arachchi, and R. Pethiyagoda, “A taxonomic revision of the South Asian hump-nosed pit vipers (Squamata: Viperidae: Hypnale)”, Zootaxa, vol. 2232, no. 1, pp. 1–28, Sep. 2009.