Schulze-Makuch D, Head JN, Houtkooper JM, Knoblauch M, Furfaro R, Fink W, et al. (July 2012). "The Biological Oxidant and Life Detection (BOLD) mission: A proposal for a mission to Mars". Planetary and Space Science. 67 (1): 57–69. Bibcode:2012P&SS...67...57S. doi:10.1016/j.pss.2012.03.008.
Schulze-Makuch D, Head JN, Houtkooper JM, Knoblauch M, Furfaro R, Fink W, et al. (July 2012). "The Biological Oxidant and Life Detection (BOLD) mission: A proposal for a mission to Mars". Planetary and Space Science. 67 (1): 57–69. Bibcode:2012P&SS...67...57S. doi:10.1016/j.pss.2012.03.008.