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IEEE Transactions on Industry Applications > 1979 > IA-15 > 6 > 630 - 633
IEEE Transactions on Industry Applications > 1977 > IA-13 > 3 > 254 - 260
Transactions of the American Institute of Electrical Engineers. Part III:... > 1958 > 77 > 3 > 814 - 817
Transactions of the American Institute of Electrical Engineers. Part III:... > 1958 > 77 > 3 > 1706 - 1707