REFERENCES
- Hellwig (H). Microwave Time and Frequency Standards. Radio Science, 14, 1979; 561.
- Kamas (G) & Howe (S). (eds). Time and Frequency Users Manual. NBS Special Publication 559, 1979.
- Papers by Kusters (J A) el al., Goldfrank (B) et al., Filler (R L) et al., Besson (R J) et al., in Proc. 34th Annual Symposium on Frequency Control, Philadelphia, PA, USA 1980.