1. ‘The canted turnstile as an omnidirectional spacecraft antenna system’, NASA Report, X-712-67-441, 1967
2. ‘Satellite turnstile antennas’, Naval Research Laboratories, Washington, 1969
3. Ancona, C., and Do-Boi, H.: ‘The symphonie satellite VHF circularly polarised antenna with toroidal pattern’, Antennas for aircraft and spacecraft, 1975), p. 148–153 IEE Conf. Publ. 128