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- [6] WIDE-RANGE DIGITAL FREQUENCY-MULTIPLIER AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, 1977, 31 (06): : 258 - 260
- [10] CONDITIONS OF DIGITAL PARAMETRIC FREQUENCY-MULTIPLIER EXCITATION RADIOTEKHNIKA I ELEKTRONIKA, 1989, 34 (05): : 1108 - 1110