1. Tatneftekhiminvest Holding. www.tnhi.ru/news/static-news1507.shtml. Cited 2015.
2. Polymer Encyclopedia (Sovetskaya entsiklopediya, Moscow, 1972), Vol. 1, p. 40 [in Russian].
3. Yu. D. Semchikov, Polymers. College Textbook (Izd-ii tsentr “Akademiya”, Moscow, 2005) [in Russian].
4. L. Horner, H. Jurgeleit, and K. Klüpfel, Liebigs Ann. Chem. 591, 108 (1955).
5. E. V. Kochetov, Al. Al. Berlin, and N. S. Enikolopyan, Vysokomol. Soedin. 8, 1018 (1966).