1. Sokolov, L. B. 1966.Polycondensation Method of the Synthesis of Polymers, 43Moscow: “Chemistry”.
2. Lipatnikov, N. A., Gritsenko, T. M., Bazilevskaja, N. P. and Zhyvotova, A. I. 1968.Synthesis and Physico-Chemistry of Polymers (Polyurethanes), 96Kiev: “Naukova Dumka,”. No. 5
3. Molecular Size Distribution in Linear Condensation Polymers1
4. Ref. 1, p. 60
5. Ref. 1, p. 54