1. Almar, I. (1988) The History of IAA SETI Committee, In: G. Marx. (ed.) Bioastronomy-The Next Steps, Kluwer Academic Publishers, Dordrecht, The Netherlands, pp. XV–XVII.
2. Arrhenius, S. (1910) L’évolution des Mondes, Bénniger, Paris.
3. Awramik, S.M., Schopf, J.W. and Walter, M.R. (1983) Filamentous fossil bacteria from the Archean of Western Australia, Precambrian Research 20: 357–374.
4. Becquerel, P. (1910) L’action abiotique de l’ultraviolet et l’hypothèse de l’origine cosmique de la vie, Comptes Rendus de l’Académie des Sciences, séance du 10 mai, Paris, pp. 86–88.
5. Brack, A., Fitton, B. and Raulin, F. (1999) Exobiology in the Solar System & The Search for Life on Mars, Report from the ESA Exobiology Team Study 1997–1998, Edited by Andrew Wilson, ESA Publications Division.