1. Variational methods for dispersion relations and elastic properties of composite materials;Kohn,1972
2. A survey of variational methods for elastic wave propagation analysis in composites with periodic structures, Dynamics of Composite Materials;Lee;ASME,1972
3. General variational methods for waves in elastic composites;Nemat-Nasser;J. Elast.,1972
4. Harmonic waves in layered composites;Nemat-Nasser,1972
5. Harmonic waves in layered composites: Bounds on frequencies;Nemat-Nasser,1974