^Narayan Sharma, Michael A. Huffman, Shreejata Gupta, Himani Nautiyal, Renata Mendonça, Luca Morino and Anindya Sinha. 2016. Watering Holes: The Use of Arboreal Sources of Drinking Water by Old World Monkeys and Apes. Behavioural Processes. DOI: 10.1016/j.beproc.2016.05.006