@Article{nhess-9-1259-2009,
AUTHOR = {Zhang, X. and Shen, X. and Liu, J. and Ouyang, X. and Qian, J. and Zhao, S.},
TITLE = {Analysis of ionospheric plasma perturbations before Wenchuan earthquake},
JOURNAL = {Natural Hazards and Earth System Science},
VOLUME = {9},
YEAR = {2009},
NUMBER = {4},
PAGES = {1259--1266},
URL = {http://www.nat-hazards-earth-syst-sci.net/9/1259/2009/},
DOI = {10.5194/nhess-9-1259-2009}
}