1. T. Hughes and J. Marsden: Mathematical foundations of continuum mechanics (in preparation).
2. T. Hughes, and J. Marsden: Classical elastodynamics as a symmetric hyperbolic system (to appear).
3. T. Hughes, T. Kato and J. Marsden: Well-posed quasi-linear second-order hyperbolic systems with applications to non-linear elastodynamics and general relativity, Arch. Rat. Mech. and Anal. (to appear).
4. Diffeomorphism groups, hydrodynamics, and general relativity;Marsden;Proc. 13th Biennial Seminar of the Canadian Math. Congress,1972
5. The Nonlinear Field Theories of Mechanics;Truesdell,1965