1. D. L. Lyman and Rim Sung Wam, Biomater. Med. Devices, Artif. Organs, 1, No. 3, 431 (1973).
2. Inventor's Certificate 450824 (1973) (USSR).
3. N. A. Platé, Polymers in Medicine [Russian translation], Mir press, Moscow (1969).
4. V. A. Bakunov, G. A. Budnitskii, and L. F. Maiboroda, Khim. Volokna, No. 6, 30?33 (1979).