Konwar L.J., Mäki-Arvela P., Kumar N., Mikkola J.-P., Sarma A.K., Deka D. Selective esterification of fatty acids with glycerol to monoglycerides over –SO3H functionalized carbon catalysts. 2016. Reaction Kinetics, Mechanisms and Catalysis. 119. 1. 121-138. 10.1007/s11144-016-1040-7.