1. Fried, B., “Some Observations on Photoelastic Materials Stressed Beyond the Elastic Limit,”Proc. SESA,8, (2),143–148 (1951).
2. Frocht, M. M. and Thomson, R. A., “Studies in Photoplasticity,” Proc. 3rd U. S. Natl. Cong. Appl. Mech., 533–540 (1958).
3. Frocht, M. M. and Cheng, Y. F., “An Experimental Study of the Laws of Double Refraction in the Plastic State in Cellulose Nitrate—Foundations for Three-Dimensional Photoplasticity,” Proc. Int. Symposium on Photoelasticity, 195–216 (1963).
4. Mönch, E. and Loreck, R., “A Study of the Accuracy and Limits of Application of Plane Photoplastic Experiments,” Proc. Int. Symposium on Photoelasticity, 169–184 (1963).
5. Ito, K., “Studies on Photoelasto-plastic Mechanics,”Jnl. of the Science Res. Inst., Tokyo,50,19–28 (1956).