D. P.  Sawant, Vinu, A., Justus, J., Srinivasu, P., and Halligudi, S. B., ?Catalytic performances of silicotungstic acid/zirconia supported SBA-15 in an esterification of benzyl alcohol with acetic acid?, Journal of Molecular Catalysis A-Chemical , vol. 276, no. 1-2, pp. 150-157, 2007.

V. V.  Balasubramanian, Devassay, B. M., Halligudi, S. B., Deepika, R., Umbarakar, S. B., and Vinu, A., ?Cyclohexylation of resorcinol with cyclohexanol catalyzed by tungstophosphoric acid supported zirconia catalysts?, Journal of Nanoscience and Nanotechnology, vol. 18, no. 4, pp. 2986-2992, 2018.