Yen, A. S., Ming, D. W., Gellert, R., Clark, B. C., Morris, R. V., Rodionov, D., Schröder, C., & Klingelhöfer, G. (2005). Subsurface weathering of rocks and soils at Gusev crater. In Lunar and Planetary Science XXXVI. Houston: Lunar and Planetary Institute.