1. J. P. Den Hartog, Advanced Strength of Materials, McGraw-Hill, New York (1952), p. 137.
2. C. C. Perry and H. R. Lissner, The Strain Gage Primer, McGraw-Hill, New York (1962).
3. R. J. Roark and W. C. Young, Formulas For Stress and Strain, McGraw-Hill, New York (1975), Chap. 10.
4. “Diaphragm Pressure Transducers,” Micro-Measurements, TN-129-2, Romulus, Michigan (1974).