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O Driscoll B, Emeleus CH, Donaldson CH, Daly JS (2009). "The roles of melt infiltration and cumulate assimilation in the formation of anorthosite and a Cr-spinel seam in the Rum Eastern Layered Intrusion, NW Scotland". Lithos. 111 (1–2): 6–20. Bibcode:2009Litho.111....6O. doi:10.1016/j.lithos.2008.11.011.
Robert John Lancashire. "Normal Spinels". CHEM2101 (C 21J) Inorganic Chemistry – Chemistry of Transition Metal Complexes. University of the West Indies. Archived from the original on 2018-08-08.