| 1. |
Charles H.
Townes: 1961, Nature. |
| 2. |
Bernard M. Oliver:
1971, Project Cyclops. |
| 3. |
V. F. Shvartsman: 1977,
Communications of the Special Astrophysical Observatory (Russian). Actual Optical SETI
observations at 550 nm. Spectral resolution < 10-6 nm. |
| 4. |
P. Connes: 1979, Conference on Life
in the Universe. |
| 5. |
Charles H. Townes: 1983, Proc. Natl.
Acad. Sci. |
| 6. |
Ben Zuckerman: 1985, Acta
Astronautica. |
| 7. |
Albert Betz: 1986, Acta
Astronautica. |
| 8. |
V.S. Streinitskij: 1991,
Springer-Verlag. |
| 9. |
John Rather: 1991, JBIS. |
| 10. |
Stuart A. Kingsley: 1991, ? |