M.  Chidambaram, Venkatesan, C., and Singh, A. P., ?Organosilanesulfonic acid-functionalized Zr-TMS catalysts: synthesis, characterization and catalytic applications in condensation reactions?, Applied Catalysis A-General, vol. 310, pp. 79-90, 2006.

R. Kumar Jha, Shylesh, S., Bhoware, S. S., and Singh, A. P., ?Oxidation of ethyl benzene and diphenyl methane over ordered mesoporous M-MCM-41 (M = Ti, V, Cr): synthesis, characterization and structure-activity correlations?, Microporous and Mesoporous Materials, vol. 95, no. 1-3, pp. 154-163, 2006.

S.  Shylesh, Srilakshmi, C., Singh, A. P., and Anderson, B. G., ?One step synthesis of chromium-containing periodic mesoporous organosilicas and their catalytic activity in the oxidation of cyclohexane?, Microporous and Mesoporous Materials, vol. 99, no. 3, pp. 334-344, 2007.

A.  Lazar, Sanjush, K. S., and Singh, A. P., ?Organofunctionalization of vanadium(III) acetylacetonate complex over aminofunctionalized SBA-15 for sulfoxidation reactions?, Advanced Porous Materials, vol. 4, 3 vol., no. 3, pp. 212-218, 2016.