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2. V. Yu. Kabashov, De-icing device, USSR author’s certificate 957332 A1 IPC H02G 7/16, 4 (1983).
3. V. S. Molodtsov and V. S. Satarov, The method of removing ice from the wires of the split phase of the power transmission line, USSR author’s certificate 1045322 A2 IPC H02G 7/16, 2 (1983).
4. A. L. Livshits, R. M. Rudakova and M. B. Guzairov, A method for determining the end of ice melting on power line wires, USSR author’s certificate 909738 A1 IPC H02G 7/16, 3 (1982).
5. R. V. Shnell, I. V. Abramov and E. N. Kufa, Method for detecting ice on power lines, USSR author’s certificate 1159099 A1 IPC H02G 7/16, 2 (1985).