D. L.  Nguyen, Umbarkar, S. B., Dongare, M. K., Lancelot, C., Girardon, J. S., Dujardin, C., and Granger, P., ?Deposition-precipitation versus anionic-exchange Au/Al2O3 catalysts: a comparative investigation towards the selective reduction of NOx?, Catalysis Communications, vol. 26, pp. 225-230, 2012.

H.  Ilbeygi, Sawant, D. P., Ruban, S. M., Reshma, K. S., Umbarkar, S. B., Halligudi, S. B., and Vinu, A., ?Direct synthesis of mesoporous siliceous phosphotungstic acid and its superior catalytic activity on the cyclohexylation of phenol?, Journal of Physical Chemistry C , vol. 125, no. 12, pp. 6723-6734, 2021.