1. Ullmann’s Encylopedia of Industrial Chemistry; 6 ed.; Wiley-VCH, 2003; Vol. 17.
2. Freitas, E. R.; Gum, C. R. Chem. Eng. Prog. 1979, 73-76.
3. Olivier-Bourbigou, H.; Forestière, A. In Ionic Liquids in Synthesis; Wasserscheid, P., Welton, T., Eds.; Wiley-VCH: Weinheim, 2003, pp 271-275.
4. Wasserscheid, P. In Ionic Liquids in Synthesis; Wasserscheid, P., Welton, T., Eds.; Wiley-VCH: Weinheim, 2003, pp 244-257.
5. Ligabue, R. A.; Dupont, J.; de Souza, R. F. J. Mol. Catal. A 2001, 169, 11-17.