| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Astrophysics on the Threshold of the 21st Century | 978-2-88124-817-7 (2-88124-817-9) | 1992 | Dean F. Smith |
| Extraterrestrial Civilizations: Problems of Interstellar Communications | 978-0-7065-1034-8 (0-7065-1034-8) | 1970 | B. N. Panovkin · L. M. Gindilis · B. V. Sukhotin · G. M. Khovanov |