1. R. F. Bunshah (Ed.) ?Techniques of Metals Research V. Measurement of Mechanical Properties? (Wiley, New York, 1971).
2. W. E. Brown (Ed.), ?Testing of Polymers? Vol 4 (Interscience, New York, 1969).
3. U. S. Lindholm, in ?Techniques of Metals Research V. Measurement of Mechanical Properties? (edited by R. F. Bunshah) (Wiley, New York, 1971) Chapter 4.
4. H. Burns, ?Encyclopaedia of Polymer Science and Technology?, Vol 7 (Interscience, New York, 1964) pp. 584?606.
5. S. Timoshenko, ?Strength of Materials? (Van Nostrand New York, 1956).