1. V. L. Biderman, P. Kh. Drozhzhin, V. A. Pugin, and V. F. Shchaveleva, Trudy NIIShP, Goskhimizdat (1957), No. 3, p. 5.
2. V. L. Biderman, Khim. Nauka i Prom.,4, No. 1, 111 (1959).
3. W. Kern, Kautschuk und Gummi,8, No. 1, 195, 233 (1955).
4. W. Kern, Faserf. und Textilt.,11, 401 (1960).
5. K. R. Williams, J. W. Hannell, and J. M. Swanson, Ind. Eng. Chem.,45, 796 (1953).