S.  A. Reddy, Gopinath, C. S., and Chilukuri, S. V., ?Selective ortho-methylation of phenol with methanol over copper manganese mixed-oxide spinel catalysts?, Journal of Catalysis, vol. 243, no. 2, pp. 278-291, 2006.

S. L.  Darshane, Suryavanshi, S. S., and Mulla, I. S., ?Nanostructured nickel ferrite: a liquid petroleum gas sensor?, Ceramics International, vol. 35, no. 5, pp. 1793-1797, 2009.