Franco Brezzi Thomas J. R. Hughes L. Donatella Marini A. Masud Mixed Discontinuous Galerkin Methods for Darcy Flow. 119-145 2005 22 J. Sci. Comput. 1 http://dx.doi.org/10.1007/s10915-004-4150-8 db/journals/jscic/jscic22.html#BrezziHMM05