A. T.  Biju, Padmanaban, M., Wurz, N. E., and Glorius, F., ?N-Heterocyclic carbene catalyzed umpolung of michael acceptors for intermolecular reactions?, Angewandte Chemie-International Edition, vol. 50, no. 36, pp. 8412-8415, 2011.

R. L.  Sutar, Kumar, V., Shingare, R. D., Thorat, S., Gonnade, R. G., and D. Reddy, S., ?General approach to N-heterocyclic carbenes with a fused tetracyclic core: ligands for suzuki-miyaura cross-coupling reaction?, European Journal of Organic Chemistry, no. 21, pp. 4482-4486, 2014.

S.  Yadav, Saha, S., and Sen, S. S., ?Compounds with low-valent p-block elements for small molecule activation and catalysis?, Chemcatchem, vol. 8, no. 3, pp. 486-501, 2016.