1. Polyimides: A Class of Thermally Stable Polymers, Ed. by M. I. Bessonov (Nauka, Leningrad, 1983) [in Russian].
2. H. Ohya, V. V. Kudryavtsev, and S. I. Semenova, Polyimide Membranes: Applications, Fabrications, and Properties (Gordon and Breach, Tokyo, 1996).
3. K. Tanaka and K.-I. Okamoto, Materials Science of Membranes for Gas and Vapor Separation, Ed. by Yu. Yampolskii, I. Pinnau, and B. D. Freeman (Wiley, Chichester, 2006), p. 271.
4. Database “Gas Separation Parameters of Glassy Polymers,” Informregistr RF No. 3585 (1998) [in Russian].
5. A. Alentiev, Yu. Yampolskii, V. Ryzhikh, and D. Tsarev, Pet. Chem. 53, 554 (2013).