1. Bowen, R. M., “Theory of Mixtures,” Continuum Physics, Vol. III (A. C. Eringen, Ed.), Academic Press, 1976.
2. Passman, S. L., “On the Balance Equations for a Mixture of Granular Materials,” University of Wisconsin Mathematics Research Center, Tech. Rept. No. 1390, 1974.
3. Passman, S. L., “Mechanics and Thermodynamics of a Mixture of a Granular Material with a Fluid,” University of Wisconsin Mathematics Research Center, Tech. Rept. No. 1391, 1974.
4. Passman, S. L., “Mixtures of Granular Materials,” Int. J. Engng. Sci. 15, 117–129 (1977).
5. Goodman, M. A., & Cowin, S. C., “A Continuum Theory for Granular Materials,” Arch. Rational Mech. Anal., 44, 249–266 (1972).