Pre One:Changsheng Cai, Yang Gao, Lin Pan, Jianjun Zhu (2015).Precise point positioning with quad-constellations: GPS, BeiDou, GLONASS and Galileo. Advances in Space Research, 56(1):133- 143. （SCI）

Next One:Lin Pan, Changsheng Cai*, Rock Santerre, Xiaohong Zhang(2016) Performance evaluation of single-frequency point positioning with GPS, GLONASS, BeiDou and Galileo.Survey Review. doi:10.1080/00396265.2016.1151628.(SCI), 2017,49 (352):197-205