1. Constraint groups
2. On the Differentiability of Local Representations for Isotropic Constraints;Danescu;Bull. Tech. Univ. lit.,1994
3. Theory of Groups and Its Applications to Physical Problems;Bagavantham,1969
4. Theory of Invariants;Spencer,1971
5. Constitutive Equations for Anisotropic and Isotropic Materials;Smith,1994