V.  Sreeja, Smitha, T. S., Nand, D., Ajithkumar, T. G., and Joy, P. Alias, ?Size dependent coordination behavior and cation distribution in MgAl2O4 nanoparticles from Al-27 solid state NMR studies?, Journal of Physical Chemistry C, vol. 112, no. 38, pp. 14737-14744, 2008.