Shen, Wen-Bin, Rong Sun, Wei Chen, Zhenguo Zhang, Jin Li, Jiancheng Han, and Hao Ding. “The Expanding Earth at Present: Evidence from Temporal Gravity Field and Space-Geodetic Data”. Annals of Geophysics 54, no. 4 (September 20, 2011). Accessed December 1, 2021. https://www.annalsofgeophysics.eu/index.php/annals/article/view/4951.