1. CHEN Zi-yong, DU Xiao-quan, XU Dong-hong, et al. 1993. The observation and research on pre-earthquake electromagnetic radiation information [J]. Acta Seismologica Sinica, 6(2): 485–494.
2. FAN Guo-hua, YAO Tong-qi, GU Zuo-wen, et al. 1991. Geomagnetic anomalous variations before Lancang-Gengma earthquake on November 6, 1988 [J]. Acta Seismologica Sinica, 4(4): 601–610.
3. Fraser-Smith A C, Bernardi A, McGill P R, et al. 1990. Low-frequency magnetic field measurements near the epicenter of the M s7.1 Loma Prieta earthquake [J]. Geophys Res Lett, 17(9): 1 465–1 468.
4. GUO Zi-qiang, LIU Bin. 1995. Frequency properties of electromagnetic emission associated with microscopic cracking in rocks [J]. Chinese Journal of Geophysics, 38(2): 221–226.
5. GUO Zi-qaing, LUO Xiang-lin, QIAN Shu-qing, et al. 1999. Electromagnetic emissions during quarry blasting [J]. Chinese Journal of Geophysics, 42(6): 834–840.