1. W. Schmidt, “An On-Board Switched Multiple Access System for Millimeter Wave Satellites”, 1969 Intelsat/IEEE Conference on Digital Satellite Communications, London, England.
2. W. Schmidt and R. Cooperman, “A Satellite Switched SDMA/TDMA System for a Wideband Multibeam Satellite”, 1973 ICC-73, Seattle, Washington.
3. K. Nosaka and T. Muratani, “A New Satellite Transponder with Regenerative Repeater and Higher Order DPSK for TDMA/SDMA System”, Proc. of Second International Conference on Digital Satellite Communications, Paris, 1972.
4. “Multiple Access Techniques for Commercial Satellites”;Puente;Proc. IEEE,1961
5. W. Schmidt, “Satellite Switched TDMA; Transponder Switched or Beam Switched”, AIAA 5th Communication Satellite Systems Conference, Los Angeles, 1974, AIAA Paper No. 74–460.