1. Elastic constants of triclinic copper sulphate pentahydrate crystals;Krishnan, R. S.;J. Phys. D: Appl. Phys.,1971
2. General anisotropic elastic tensors in rocks: approximation, invariants, and particular directions;Arts, R.;Society of Exploration Geophysicists, Expanded Abstracts, 61-st Annual International Meeting,1991
3. [3] Arts, R. A study of general anisotropic elasticity in rocks by wave propagation, Ph. D. Thesis, University Pierre et Marie Curie (1993)
4. Une nouvelle analyse des symétries d’un matériau élastique anisotrope. Exemple d’utilisation à partir de mesures ultrasonores;François, M.;C. R. Acad. Sci. Paris, Sér. IIb,1996
5. Computing the optimal transversely isotropic approximation of a general elastic tensor;Dellinger, J.;Geophysics,2005