1. A. Robert, “Methode nouvelle de photoelasticimetrie a deux dimensions et a trois dimensions,” JOBIN et YVON (26, rue Berthollet, 92-ARCUEIL), (1966), pp. 6–9.
2. M. L. Gorb and A. A. Ostrovsky,Devices for Studying Mechanical Properties of Materials [in Russian], Naukova Dumka, Kiev (1973).
3. M. Lorrain and J. C. Maso, “Sur la realisation experimentale d'un charmp homogenes de contraintes planes en traction biaxiale a l'etreinte,”C. R. Acad. Sci., Paris,273, 731–734 (1971).
4. G. Terry, “The biaxial tensile strain field from a conventional load-splitting tree,”Strain,13, No. 3, 110–112 (1979).
5. J. Kibler and R. Roberts, “The effect of biaxial stresses on fatigue and fracture,”J. Eng. for Industry,92, 727–734 (1970).