1. Zachariades AE, Porter RS (1983) The Strength and Stiffness of Polymers. Marcel Dekker Ink, New York and Basel 1
2. Han KS, Wallace JF, Truss RN, Geil PH (1981) J Macromol Sci Phys B 19:(3) 313
3. Komitov P, Neft & Chimia (collection) (bulg) (1976) Burgas, Bulgaria, 161
4. Kresteva M, Nedkov E, Radilova A (1985) Colloid Polymer Sci 263:273
5. Kresteva M, Nedkov E, Krestev V (1983) Bulg J Phys 10:(5) 553