1. Engineering analysis;Crandall,1956
2. An analysis of the finite element method;Strang,1973
3. The finite difference method in partial differential equations;Mitchell,1980
4. Petrov-Galerkin methods for non-self-adjoint problems;Morton,1980
5. Upwinding by Petrov-Galerkin methods in convection-diffusion problems;Mitchell;J. Comp. Appl. Math.,1980