1. Interstellar Travel and Communication Bibliography-1986 Update;Paptrony;JBIS,1987
2. Journal of the British Interplanetary Society (JBIS): ALL Interstellar Studies issues in Seventies, Eighties and Nineties (up-to-date)
3. A Grand Strategy for the Species;Michaud,1981
4. The Anthropic Cosmologlcal Principle;Barrow,1990
5. The Self-Reproducing Inflationary Universe;Linde;Scientific American Special Issue,1998