Qin Yue, Lei Huimin, Yang Dawen, Gao Bing, Wang Yuhan, Cong Zhentao, Fan Wenjie. (2016). Long-term change in the depth of seasonally frozen ground and its ecohydrological impacts in the Qilian Mountains, northeastern Tibetan Plateau. Journal of Hydrology, 542C, 204-221. DOI: 10.1016/j.jhydrol.2016.09.008