N.  Kulal, Vetrivel, R., Gopinath, C. S., Ravindran, R. K., Rao, V. N., Shetty, M., Shrikanth, R., Rangappa, D., and Shanbhag, G. V., ?Green route for carbonylation of amines by CO2 using Sn-Ni-O bifunctional catalyst and theoretical study for finding best suited active sites?, Chemical Engineering Journal , vol. 419, p. 129439, 2021.