1. CN Patent 103690461, 2014.
2. EP Patent 1690923, 2006).
3. CN Patent 103451044, 2013.
4. Sumich, A.I., Yeshchanka, L.S., Alekseev, A.D., and Chumak, S.V., Trudy Belarus. Gos. Tekhn. Univ., 2012, no. 3, Khim. Tekhnol. Neorgan. Veshch., pp. 91–94.
5. UA Patent 77602, 2006.