1. S. Germain M. Scherer P. Steinmann On Inverse Form Finding for Anisotropic Hyperelasticity in Logarithmic Strain Space, Int. J. of Structural Changes in Solids - Mechanics and Applications, Volume 2. No.2 November 2010, pp.1-16.
2. J. Nocedal S. J. Wright Numerical Optimization Second Edition, Springer Series in Operations Research.
3. M. Schmidt "http://www.cs.ubc.ca/schmidtm/Software/minFunc.html
4. S. Sutcliffe Spectral Decomposition of the Elasticity Tensor, J. of Applied Mechanics, Vol. 59, 1992, pp.762-773.