Kaduk, James A.; Pei, Shiyou (1995). "The Crystal Structure of Hydrated Sodium Aluminate, NaAlO2•5/4H2O, and Its Dehydration Product". Journal of Solid State Chemistry. 115 (1): 126–139. doi:10.1006/jssc.1995.1111.
"Identification and characterisation of three novel compounds in the sodium–aluminium–oxygen system", Marten G. Barker, Paul G. Gadd and Michael J. Begley, J. Chem. Soc., Dalton Trans., 1984, 1139–1146, doi:10.1039/DT9840001139