1. Weissenberg, K., The testing of materials using the rheogoniometer, published by Farol Engineers (Sangamo Controls).
2. Benbow, J. J. Laboratory Practice12, 6 (1973).
3. Walters, K., Basic concepts and formulae for the rheogoniometer, Sangamo Controls (1968).
4. ICI Organics Division Note NDP 195/2Ed/33/362.
5. Ferry, J. D., Viscoelastic Properties of Polymers, 2nd Edition, p. 59 (New York 1970).