Wei Li, Xvming Qi, Xueli Lu, Li Yuan and Huaiqing Deng, 2024. Physiological Cycle of Adult Females and the Sex Identification of Juveniles in Hainan Gibbons: A Preliminary Study. Pakistan J. Zool., 56: 1653-1660. 
DOI: https://dx.doi.org/10.17582/journal.pjz/20220908130929