1. Gil’mullin, R.R., Ziyatdinov, A.Sh., Gil’manov, Kh.Kh., and Diyarov, I.N., Khim. Khim. Tekhnol., 2005, vol. 48, no. 9, p. 68.
2. Budyakov, Yu.V., Krasnykh, E.L., Levanova, S.V., Sokolov, A.B., and Morozov, V.E., Ross. Khim. Zh., 2006, vol. 50, no. 3, p. 42.
3. Minachev, Kh.M. and Dergachev, A.A., Russ. Chem. Rev., 1990, vol. 59, no. 9, p. 885.
4. Parmon, V.N. and Noskov, A.S., Katal. Prom-sti., 2007, no. 4, p. 3.
5. Dergachev, A.A. and Lapidus, A.L., Ross. Khim. Zh., 2008, vol. 52, no. 4, p. 15.