SEISMOIONOSPHERIC ANOMALIES OBSERVED BEFORE WENCHUAN EARTHQUAKE USING GPS AND DEMETER DATA
YAN Xiang-xiang, SHAN Xin-jian, CAO Jin-bin, TANG Ji, WANG Fei-fei
SEISMOLOGY AND GEOLOGY . 2012, (1): 160 -171 .  DOI: 10.3969/j.issn.0253-4967.2012.01.015