1. E. E. Rylov, V. L. Karpov, and V. A. Kargin, ZhFKh, 27, No.4, 579 (1953).
2. M. P. Penkova and A. A. Konkin, in ?Carbochain Fibres? (in Russian), Khimiya (1966), p.54.
3. N. V. Mikhailov, E. V. Khait, et al., Khim. volokna, No.4, 26 (1963).
4. B. E. Geller, M. V. Polovnikova, M. Sh. Tairov, N. V. Vostrilova, T. I. Sushkevich, Z. Sakalauskas, and V. Grabauskas, Fibre Chemistry, No.5 (1969).
5. N. V. Mikhailov, V. O. Gorbacheva, E. M. Aizenshtein, N. S. Khokhlova, and B. V. Petukhov, Khim. volokna, No.5, 22 (1964).