1. R. L. Ballman, ?Extensional flow of polystyrene melt? Rheol. Acta., No. 4, 137?140 (1965).
2. V. D. Fikhman, B. V. Radushkevich, and G. V. Vinogradov, ?Rheological properties of polymers subjected to tensioning at a constant strain rate and at a constant rate of elongation? in: Progress in Polymer Rheology [in Russian], Moscow (1970), pp. 9?23.
3. B. V. Radushkevich, V. D. Fikhman, and G. V. Vinogradov, ?Viscous and relaxation properties of polymers during elongation? in: Progress in Polymer Rheology [in Russian], Moscow (1970), pp. 24?39.
4. J. M. Dealy, ?Extensional flow of non-Newtonian fluids? Rev. Polym. Eng. Sci.,11, No. 6, 433?444 (1971).
5. J. Meissner, ?Deformations verhalten der Kunststoffe im flüssige und im festen zustand? Kunstst. Plast. (Munich), No. 9, 688?695 (1971).