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IEEE Transactions on Industry Applications > 1979 > IA-15 > 6 > 640 - 643
IEEE Transactions on Industry Applications > 1977 > IA-13 > 3 > 199 - 207
Transactions of the American Institute of Electrical Engineers. Part III:... > 1959 > 78 > 3 > 28 - 34
Transactions of the American Institute of Electrical Engineers. Part III:... > 1958 > 77 > 3 > 1543 - 1551
Transactions of the American Institute of Electrical Engineers. Part III:... > 1958 > 77 > 3 > 1707 - 1715