Torus approach in high degree gravity field model determination from GOCE satellite gradiometry observations
LIU Huanling, WEN Hanjiang, XU Xinyu, ZHAO Yongqi, CAI Jianqing
Acta Geodaetica et Cartographica Sinica . 2020, (8): 965 -973 .  DOI: 10.11947/j.AGCS.2020.20200044