1. Cotter, B., & R. S. Rivlin: Tensors associated with time-dependent stress. Quart. Appl. Math. 13, 177–182 (1955).
2. Ehresmann, C.: Introduction à la théorie des structures infinitésimales et des pseudo-groupes de Lie. Colloques internationaux du centre national de la recherche scientifique. Géométríe différentielle, 97–110. Paris 1953.
3. Green, A. E.: Simple extension of a hypo-elastic body of grade zero. J. Rational Mech. Anal. 5, 637–642 (1956).
4. Green, A. E., & R. S. Rivlin: The mechanics of non-linear materials with memory. Arch. Rational Mech. Anal. 1, 1–34 (1957).
5. Noll, W.: On the continuity of the solid and fluid states. J. Rational Mech. Anal. 4, 3–81 (1955).