1. Yu. I. Khol’kin, Tekhnologiya gidroliznykh proizvodstv [Technology of Hydrolysis Manufacturing], Lesnaya Promyshlennost’, Moscow, 1989, 496 pp. (in Russian).
2. Pat. EP 2298851 B1, 2014.
3. Pat. RF2365617, Byull. Izobret. [Invention Bulletin], 2009, 41 (in Russian).
4. Pat. US 20060199970 Al, 2006.
5. Pat. US 4390345 A, 1983.