1. Pernak, J., Czepukowicz, A., and Pozniak, R., Ind. Eng. Chem. Res., 2001, vol. 40, no. 11, pp. 2379–2383.
2. Rajendran, A., Ramu, S., and Karthikeyan, C.A., Asian J. Sci. Technol., 2011, vol. 32, no. 2, pp. 001–003.
3. Vygodskii, Ya.S., Lozinskaya, E.I., and Shaplov, A.S., Ross. Khim. Zh., 2006, vol. 48, no. 6, pp. 40–50.
4. Kustov, L.M., Vasina, V.A., and Ksenofontov, V.A., Ross. Khim. Zh., 2004, vol. 48, no. 6, pp. 13–35.
5. Esser, J., Wasserscheid, P., and Jess, A., Green Chem., 2004, no. 6, pp. 316–322.