The Carnegie Institution Geophysical Laboratory Seminar, "Analysis of evidence of Mars life" held 05/14/2007;
Summary of the lecture given by Gilbert V. Levin, Ph.D.
http://arxiv.org/abs/0705.3176, published by Electroneurobiología vol. 15 (2), pp. 39–47, 2007
Navarro-González, R.; et al. (2006). “The limitations on organic detection in Mars-like soils by thermal volatilization-gas chromato-graphy-MS and their implications for the Viking results”. Proceedings of the National Academy of Sciences103 (44): 16089–16094. doi:10.1073/pnas.0604210103.
McKay, D.S., Gibson, E.K., ThomasKeprta, K.L., Vali, H., Romanek, C.S., Clemett, S.J., Chillier, X.D.F., Maechling, C.R., Zare, R.N. (1996). “Search for Past Life on Mars: Possible Relic Biogenic Activity in Martian Meteorite ALH84001”. Science273: 924–930. doi:10.1126/science.273.5277.924. PMID8688069.
Tosca, N. J. (2008). “Water Activity and the Challenge for Life on Early Mars”. Science320 (5880): 1204–1207. doi:10.1126/science.1155432.
V. Formisano, S. Atreya T. Encrenaz, N. Ignatiev, M. Giuranna (2004). “Detection of Methane in the Atmosphere of Mars”. Science306 (5702): 1758–1761. doi:10.1126/science.1101732.
V. A. Krasnopolskya, J. P. Maillard, T. C. Owen (2004). “Detection of methane in the martian atmosphere: evidence for life?”. Icarus172 (2): 537–547. doi:10.1016/j.icarus.2004.07.004.
Mumma, M. J.; Novak, R. E.; DiSanti, M. A.; Bonev, B. P., "A Sensitive Search for Methane on Mars" (abstract only). American Astronomical Society, DPS meeting #35, #14.18.
Evidence for ancient Martian life. E. K. Gibson Jr., F. Westall, D. S. McKay, K. Thomas-Keprta, S. Wentworth, and C. S. Romanek, Mail Code SN2, NASA Johnson Space Center, Houston TX 77058, USA.