1. British Patent No. 29 456 (1964).
2. G. S. Dvornitskii, Twisting and Rewinding of Rayon in Chemical Fiber Production [in Russian], Moscow (1959).
3. G. A. Van Fo Fy, Reinforced-Plastic Structures [in Russian], Kiev (1971).
4. V. V. Bolotin, I. I. Gol'denblat, and A. F. Smirnov, Structural Mechanics. Present State and Prospects for Development [in Russian], Moscow (1972).