9 citations as recorded by crossref.

1. The INFREP Network: Present Situation and Recent Results P. Biagi et al.
2. Amplitude Variations of VLF Signal of NWC Transmitter (19.8 khz) Propagating Over the Earthquake Epicentre M. Gotovcev et al.
3. Ionospheric effects of earthquakes in Japan in March 2011 obtained from observations of lightning electromagnetic radio signals V. Mullayarov et al.
4. Researching of quasiperiodic variations in the amplitude of VLF electromagnetic signals from lightning discharges passing over strong earthquakes V. Argunov et al.
5. The European VLF/LF radio network: current status P. Biagi et al.
6. LF radio anomalies revealed in Italy by the wavelet analysis: Possible preseismic effects during 1997–1998 P. Biagi et al.
7. Variations of VLF radio signals and atmospherics during the deep earthquake with M = 8.2 occurred on 24 May 2013 near Kamchatka peninsula V. Mullayarov et al.
8. The LF radio anomaly observed before the M w  = 6.5 earthquake in Crete on October 12, 2013 T. Maggipinto et al.
9. Review of Subionospheric VLF/LF Radio Signals for the Study of Seismogenic Lower-Ionospheric Perturbations M. Hayakawa