Materials with spherical structure

Capriz, G., & P. Podio-Guidugli, Discrete and Continuous Bodies with Affine Structure. Annali Mat. Pura Appl. (IV), Vol. CXI, pp. 195–217, 1976. Capriz, G., & P. Podio-Guidugli, Formal Structure and Classification of Theories of Oriented Materials. Annali Mat. Pura Appl. (IV), Vol. CXV, pp. 17–39, 1977. Nunziato, J. W., & S. C. Cowin, A Nonlinear Theory of Elastic Materials with Voids. Arch. Rational Mech. Anal., 72, pp. 175–201, 1979. Attalla, G., & P. Podio-Guidugli, On Modeling the Solids Conveying Zone of a Plasticating Extruder. Polymer Eng. Sci., Vol. 20, pp. 709–715, 1980. Gurtin, M. E., & P. Podio-Guidugli, The Thermodynamics of Constrained Materials. Arch. Rational Mech. Anal., 51, pp. 192–208, 1973. Goodman, M. A., & S. C. Cowin, A Continuum Theory for Granular Materials. Arch. Rational Mech. Anal., 44, pp. 249–266, 1972.