Clifford, Stephen M., Farmer, Jack, Carr, Michael H., Des Marais, Dave, Bibring, Jean-Pierre, Craddock, Robert A., and Newsom, Horton. 2014. "
Introduction to the Early Mars III Special Section and Key Questions from the Third International Conference on Early Mars."
Journal of Geophysical Research. E. Planets. 119 (8):1892–1894.
https://doi.org/10.1002/2014JE004643