A mandible from the Middle Pleistocene Hexian site and its significance in relation to the variability of Asian Homo erectus - Liu, Wu; Martinón-Torres, María; Kaifu, Yousuke; Wu, Xiujie; Kono, Reiko T.; Chang, Chunhsiang; Wei, Pianpian; Xing, Song; Huang, Wanbo; Bermúdez de Castro, José María (2017)