1. GIC Recordings. http://eurisgic.org/.
2. Vorobev, A.V., Pilipenko, V.A., Sakharov, Ya.A., and Selivanov, V.N., Statistical relationships between variations of the geomagnetic field, auroral electrojet, and geomagnetically induced currents, Sol.-Terr. Phys., 2019, vol. 5, no. 1.
3. Carroll, D.P., Kasturi, S., Subudhi, M., and Gunther, W., Harmonic Effects of Solar Geomagnetically Induced Currents on the Electrical Distribution System in Nuclear Power Plants, Washington, DC: US Dep. Energy, 1992. https://www.osti.gov/servlets/purl/10121547.
4. Rodger, C.J., Clilverd, M.A., Mac Manus, D.H., Martin, I., Dalzell, M., Brundell, J.B., Divett, T., Thomson, N.R., Petersen, T., Obana, Y., and Watson, N.R., Geomagnetically induced currents and harmonic distortion: storm time observations from New Zealand, Space Weather, 2020, vol. 18. https://doi.org/10.1029/2019SW002387
5. Sivokon, V.P., Serovetnikov, A.S., and Pisarev, A.V., Higher harmonics as an indicator of geomagnetically induced currents, Elektro. Elektrotekh., Elektroenerg., Elektrotekh. Prom-st’, 2011, no. 3.