The following publications are possibly variants of this publication:
- Signal detection and processing of seismic electromagnetic radiation in ELF bandHiroshi Yasukawa, Seiji Adachi, Masayasu Hata, Ichi Takumi. icecsys 2001: 1477-1480 [doi]
- Global signal elimination from ELF band electromagnetic signals by Independent Component AnalysisMotoaki Mouri, Arao Funase, Andrzej Cichocki, Ichi Takumi, Hiroshi Yasukawa, Masayasu Hata. eusipco 2006: 1-5 [doi]
- Estimation of EM radiation source in ELF bandIchi Takumi, Shoichi Saito, Akio Shimura, Masayasu Hata, Hiroshi Yasukawa. igarss 2002: 3551-3553 [doi]
- Global Noise Elimination from ELF Band Electromagnetic Signals by Independent Component AnalysisMotoaki Mouri, Arao Funase, Andrzej Cichocki, Ichi Takumi, Hiroshi Yasukawa, Masayasu Hata. ica 2006: 384-391 [doi]