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Shepard, Micael K.; Taylor, Patrick A.; Nolan, Michael C. et al. (2015). “A radar survey of M- and X-class asteroids: III. Insights into their composition, hydration state, and structure.”. Icarus245: 38–55. Bibcode: 2015Icar..245...38S. doi:10.1016/j.icarus.2014.09.016.
Hardersen, Paul S.; Gaffey, Michael J.; Abell, Paul A. (2005). “Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroid”. Icarus175 (1): 141. Bibcode: 2005Icar..175..141H. doi:10.1016/j.icarus.2004.10.017.
Ockert-Bell, M.; Clark, B. E.; Shepard, M. K. et al. (2010). “The composition of M-type asteroids: Synthesis of spectroscopic and radar observations”. Icarus210 (2): 674–692. Bibcode: 2010Icar..210..674O. doi:10.1016/j.icarus.2010.08.002.
Magri, C.; Nolan, Michael C.; Ostro, Steven J.; Giorgini, Jon D. (2007). “A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999–2004”. Icarus186 (1): 126–151. Bibcode: 2007Icar..186..126M. doi:10.1016/j.icarus.2006.08.018.
Asphaug, E.; Reufer, A. (2014). “Mercury and other iron-rich planetary bodies as relics of inefficient accretion”. Nature Geoscience7 (8): 564–568. Bibcode: 2014NatGe...7..564A. doi:10.1038/NGEO2189.