Squyres, Steven W., Andrew H. Knoll, Raymond E. Arvidson, James W. Ashley, James F. III Bell, Wendy M. Calvin, Philip R. Christensen, et al. 2009. Exploration of Victoria Crater by the Mars rover Opportunity. Science 324(5930): 1058-1061.
Herkenhoff, Ken E., John Grotzinger, Andrew H. Knoll, Scott M. McLennan, Catherine Weitz, Aileen Yingst, Robert Anderson, et al. 2008. Surface processes recorded by rocks and soils on Meridiani Planum, Mars: Microscopic Imager observations during Opportunity's first three extended missions. Journal of Geophysical Research-Planets 113, no. E12S32: 1-39
Knoll, Andrew H., Bradley L. Jolliff, William H. Farrand, James F. Bell, Benton C. Clark, Ralf Gellert, Matthew P. Golombek, et al. 2008. Veneers, rinds, and fracture fills: Relatively late alteration of sedimentary rocks at Meridiani Planum, Mars. Journal of Geophysical Research-Planets 113, no. E06S16: 1-27
Calvin, Wendy M., Jeff D. Shoffner, Jeffrey R. Johnson, Andrew H. Knoll, John M. Pocock, Steven W. Squyres, Cathy M. Weitz et. al. 2008. Hematite spherules at Meridiani: Results from MI, Mini-TES, and Pancam. Journal of Geophysical Research-Planets 113(E12S37): 1-27
Farrand, William H., James F. Bell, Jeffrey R. Johnson, Bradley L. Jolliff, Andrew H. Knoll, Scott M. McLennan, Steven W. Squyres, et al. 2007. Visible and near-infrared multispectral analysis of rocks at Meridiani Planum, Mars, by the Mars Exploration Rover Opportunity. Journal of Geophysical Research-Planets 112, E06S02: 1-28