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USA. Copyright 1971, IEE
P.Sh.Fridberg, “" Solution of the Integral Equation for the Voltage at the Narrow Strongly Radiating Slit"”, Radio Engineering and Electronic Physics, 16:9 (1972), 1444-1452.
USA. Copyright 1972, IEE
P.Sh.Fridberg, “" Voltage at the narrow Slit in the Resonator Wall"”, Radio Engineering and Electronic Physics, 18:3 (1973), 341-353.
USA. Copyright 1973, IEE