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- [8] NEW DIGITAL DATA-TRANSMISSION SYSTEM JAPAN TELECOMMUNICATIONS REVIEW, 1981, 23 (04): : 327 - 333
- [9] REMOTE POWERED DATA-TRANSMISSION SYSTEM INTELEC 89 : THE ELEVENTH INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE, VOLS 1 AND 2: CONFERENCE PROCEEDINGS, 1989, : 539 - 543