Yen, A. S., Mittlefehldt, D. W., McLennan, S. M., Gellert, R., Bell, J. F., McSween, H. Y., Ming, D. W., McCoy, T. J., Morris,
R. V., Golombek, M., Economou, T., Madsen, M. B., Wdowiak, T., Clark, B. C., Jolliff, B. L., Schröder, C., Brückner, J., Zipfel,
J., & Squyres, S. W. (2006). Nickel on Mars: Constraints on meteoritic material
at the surface. Journal of Geophysical Research-Planets, 111(E12):.
doi:10.1029/2006JE002797.