M. K.  Munshi, Biradar, P. S., Gade, S. M., Rane, V. H., and Kelkar, A. A., ?Efficient synthesis of glycerol carbonate/glycidol using 1,8-diazabicyclo [5.4.0] undec-7-ene (DBU) based ionic liquids as catalyst?, RSC Advances, vol. 4, no. 33, pp. 17124-17128, 2014.