1. A smooth hyperbolic approximation to the Mohr-Coulomb yield criterion
2. Zienkiewicz, O.C. and Pande, G.N., Some Useful Forms of Isotropic Yield Surfaces for Soil and Rock Mechanics, Finite Elements in Geomechanics, Gudehus, G., 179–190, John Wiley & Sons, Inc, New York, London, Sydney, 1977
3. MFrontInterface.jl: MFront material models in JuliaFEM, Frondelius, Tero and Helfer, Thomas and Yashchuk, Ivan and Vaara, Joona and Laukkanen, Anssi, Koivurova, H. and Niemi, A. H., Proceedings of the 32nd Nordic Seminar on Computational Mechanics, 2019, Oulu
4. Julia: A Fresh Approach to Numerical Computing
5. JuliaFEM beam element implementation