Tenzin, Ngagyel, Sara Bumrungsri, and Chutamus Satasook. “Geographical Variation within the Species Ratufa bicolor (Sparrman, 1778) Inferred from External and Cranial Morphology (Sciuridae: Ratufinae) in Thailand”. The Thailand Natural History Museum Journal 7, no. 1 (May 1, 2013): 1–10. accessed October 4, 2026. https://li05.tci-thaijo.org/index.php/thnhmj/article/view/1819.