1. M.E. Gurtin, The linear theory of elasticity. In: Vol. VIa/2 of the Handbuch der Physik, S. Fl�gge (ed.), Springer-Verlag, Berlin, Heidelberg, New York (1972).
2. M.E. Gurtin, A short proof of the representation theorem for isotropic, linear stress-strain relations. J. Elasticity 4 (1974) 243?245.
3. Zhong-heng Guo, The representation theorem for isotropic, linear asymmetric stress-strain relations, J. Elasticity 13 (1983) 121?124.
4. C. Truesdell and W. Noll, Non-linear field theories of mechanics, In: Vol. III/3 of the Handbuch der Physik, S. Fl�gge (ed.), Springer-Verlag, Berlin, Heidelberg, New York (1965).