1. Cao J B, Ding W Z, Reme H, et al. 2011. The statistical studies of the inner boundary of plasma sheet, Ann Geophys, 29: 289–298, doi: 10.5194/angeo-29-289-2011
2. Carpenter D L, Anderson R R. 1992. An ISEE/whistler model of equatorial electron density in the magnetosphere, J Geophys Res, 97: 1097–1108
3. Ding W Z, Cao J B, Zeng L, et al. 2010. Simulation studies of plasma sheet ion boundary (in Chinese). Chin J Geophys, 53: 1505–1514
4. Fu H S, Tu J, Cao J B, et al. 2010a. IMAGE and DMSP observations of a density trough inside the plasmasphere. J Geophys Res, 115: A07227, doi: 10.1029/2009JA015104
5. Fu H S, Tu J, Song P, et al. 2010b. The nightside-to-dayside evolution of the inner magnetosphere: Imager for Magnetopause-to-Aurora Global Exploration Radio Plasma Imager observations. J Geophys Res, 115: A04213, doi: 10.1029/2009JA014668