Grismer, L. Lee, Jesse L. Grismer, and Jimmy A. Mcguire. 2006. “A New Species of Pitviper of the Genus Popeia (Squamata: Viperidae) from Pulau Tioman, Pahang, West Malaysia”. Zootaxa 1305 (1). Auckland, New Zealand:1–19. https://doi.org/10.11646/zootaxa.1305.1.1.