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- [42] FEEDBACK IN NEGATIVE-RESISTANCE DEVICES TELECOMMUNICATIONS AND RADIO ENGINEER-USSR, 1966, (04): : 76 - &
- [44] NEGATIVE-RESISTANCE TRANSISTORIZED OSCILLATOR ELECTRONIC ENGINEERING, 1967, 39 (477): : 715 - &
- [46] SILICON NEGATIVE-RESISTANCE DIODES ELECTRONICS & COMMUNICATIONS IN JAPAN, 1966, 49 (05): : 89 - &