1. K. Tanaka, Solvent Free Organic Synthesis, Wiley- VCH, Weinheim, 2003.
2. N.V. Plechkova, K.R. Seddon, Chem. Soc. Rev. 37 (2008) 123.
3. P. Wasserscheid, T. Welton, Ionic Liquids in Synthesis, Wiley-VCH, Weinheim, 2008.
4. M. Lombardo, F. Pasi, C. Trombini, K.R. Seddon, W.R. Pitner, Green Chem. 9 (2007) 321.
5. Z.F. Zhang, E. Xie, W.J. Li, S.Q. Hu, J.L. Song, T. Jiang, B.X. Han, Angew. Chem. Int. Ed. 47 (2008) 1127.