Observational evidences for the speed of the gravity based on the Earth tide Tang, KeYun ; Hua, ChangCai ; Wen, Wu ; Chi, ShunLiang ; You, QingYu ; Yu, Dan Abstract Publication: Chinese Science Bulletin Pub Date: February 2013 DOI: 10.1007/s11434-012-5603-3 Bibcode: 2013ChSBu..58..474T