1. Green, A. E., R. S. Rivlin, & R. T. Shield, Proc. Roy. Soc. A 211, 128 (1952).
2. Truesdell, C., & W. Noll, The Non-Linear Field Theories of Mechanics. Berlin-Heidelberg-New York: Springer 1965.
3. Kraut, E. A., Rev. Geophys. 1, 401 (1963).
4. Payton, R. G., Quart. Appl. Math, (to appear).
5. Truesdell, C., & R. A. Toupin, The Classical Field Theories. Berlin-G�ttingen-Heidelberg: Springer 1960.