Rookmaaker, Kees. “On the Alleged Presence of the Two-Horned Sumatran Rhinoceros and the One-Horned Javan Rhinoceros in the Himalayan Kingdom of Bhutan”. Pachyderm 57 (July 21, 2016): 116–117. Accessed May 6, 2024. https://pachydermjournal.org/index.php/pachyderm/article/view/399.