1. Dally, J. W. andRiley, W. F., Experimental Stress Analysis, McGraw-Hill, New York, N. Y., 165–167, (1965).
2. Timoshenko, S., Theory of Elasticity, McGraw-Hill, New York, N. Y., 16, (1934).
3. Pih, H. andKnight, C. E., “Photoelastic Analysis of Anisotropic Fiber Reinforced Composites,”Jnl. Compos. Mater. 3 (1),94–107, (1969).
4. Frocht, M. M., Photoelasticity,1,Chapt. 8,John Wiley & Sons,New York, N. Y. (1941).