2.  KOK, P. J. R. & PAUWELS, O. S. G. 2003. Amphibian Fauna of Na Haeo: a preliminary overview., pp 173-180, in: L. Ampornpan, L. A. & S. S. Dhillion. (Eds): The Environment of Na Haeo, Thailand: biodiversity, non-timber products and conservation. Craftman Press, Bangkok.

1.  PAUWELS, O. S. G. & KOK, P. J. R. 2003. Reptiles of Na Haeo: a preliminary survey, pp 163-171, in: L. Ampornpan, L. A. & S. S. Dhillion (Eds): The Environment of Na Haeo, Thailand: biodiversity, non-timber products and conservation. Craftman Press, Bangkok.