1. The debate over whether liquid water or some other fluid (including gas-fluidized dry flow) is responsible for erosional landforms on Mars (which include but are not limited to the martian outflow channels valley networks and gullies) is not specifically addressed in this work. Most geoscientists familiar with martian landforms agree that water is the most likely candidate fluid.
2. Water on Mars 1996
3. V. R. Bakeret al., in Mars, H. H. Kieffer, B. M. Jakosky, C. W. Snyder, M. S. Matthews, Eds. (Univ. of Arizona Press, Tucson, AZ, 1992), pp. 493–522.
4. Water and the martian landscape
5. Mars Observer camera