1. Kiskachi, V.M. and Nazarov, Yu.G., Signaling of single- phase earth faults in compensated 6–10 kV cabling networks, Tr. Vses. Nauchno-Issled. Inst. Elektroenerg., 1963, no. 16.
2. Kiskachi, V.M., Surtseva, S.E., Georshenina, N.M., et al., Earth-fault signaling devices in 6–10 kV cabling network, Elektr. Stn., 1972, no. 4.
3. Borukhman, V.A., The operation of selective earth fault protection in 6–10 kV cabling networks and their improvement, Energetik, 2000, no. 1.
4. Zhezhelenko, I.V., Vysshie garmoniki v sistemakh elektrosnabzheniya prompredpriyatii (Higher Harmonics in the Power Supply Systems of Industrial Enterprises), Moscow: Energoatomizdat, 2000.
5. Kiskachi, V.M., Selectivity of earth fault signaling using higher harmonics of residual currents, Elektrichestvo, 1967, no. 9.