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- [4] NEW EQUIPMENT FOR RADIO TELEPHONY LINKS .1. RADIO-RELAY EQUIPMENT SYSTEMS TECHNOLOGY, 1978, (28): : 25 - 30
- [6] DEVELOPMENTS IN DIGITAL RADIO LINK EQUIPMENT PHILIPS TELECOMMUNICATION REVIEW, 1977, 35 (03): : 134 - 145
- [8] DIGITAL TRANSMISSION-SYSTEMS ON RADIO LINKS AND MICROWAVE LINKS COMMUTATION & TRANSMISSION, 1979, 1 (01): : 17 - 34