Zhang, Yongjun, Cao, Qing S., Rubenstein, Daniel I., Zang, Sen, Songer, Melissa A., Leimgruber, Peter, Chu, Hongjun, Cao, Jie, Li, Kai, and Hu, Defu. 2015. "Water Use Patterns of Sympatric Przewalski's Horse and Khulan: Interspecific Comparison Reveals Niche Differences."
PloS One. 10 (7):1–17.
https://doi.org/10.1371/journal.pone.0132094