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    Baker, V.R. and Partridge, J.B., 1986: Small martian valleys: Pristine and degraded morphology, J. Geophys. Res., 91, 3561-3572.

    Bjoraker, G.L., Mumma, M.J. and Larson, H.P., 1989: The Value pf D/H in the Martian atmosphere: Measurement pf HDO and H${}_{2}$O using the Kuiper Airbone Observatory, Proc.4th Int.Conf.on Mars, Tucson,Jan,10-13,1989,pp.69-70.

    Carr, M.H., 1987: Water on Mars, Nature, 326, 30-35.

    Carr, M.H., 1996: Water on Mars, Oxford Univ.Press, 229pp.

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    Hartmann, W.K., 1973: Martian cratering 4: Mariner 9 initial analysis of cratering chronology, J. Geophys. Res., 79, 4096-4116.

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    Pepin, R.O., 1991: Evolution of atmosphere volatiles, Icarus,92,2-79.

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    Watson, L.L., Hutcheon, I.D., Epstein, S. and Stolper, E.M., 1994: Water on Mars: Clues from deuterium/hydrogen and water contents of hydrous phase in SNC meteorites, Science,265,86-90.

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