1. Derivative calculation from finite element solutions
2. Hughes T. J. R. and Brooks A. N. (1982). “A Theoretical Framework for Petrov-Galerkin Methods with Discontinuous Weighting Functions: Applications to the Streamline-Upwind Procedure.” Finite Elements in Fluids Gallagher R. H. ed. Vol. 4 Wiley London 47–64.
3. The Continuous Galerkin Method Is Locally Conservative
4. King I. P. and DeGeorge J. F. (1995). “Multidimensional modeling of water quality using the finite element method.” Estuarine and Coastal Modeling Proc. 4th Int. Conf. M. L. Spalding and R. T. Cheng eds. October 26–28 San Diego sponsored by the Coastal Zone Management Committee of the Waterways Ports Coastal and Ocean Division (WPOC) and the Computational Hydraulics Committee of the Hydraulics Division of the American Society of Civil Engineers (ASCE) 340–354.