@TechReport{CKPS00,
  author = 	 {Cockburn, Bernardo and Kanschat, Guido and Perugia, Ilaria and
                  Schötzau, Dominik},
  title = 	 {Superconvergence of the Local Discontinuous Galerkin
                  Method for Elliptic Problems on Cartesian Grids},
  institution =  UMSI,
  year = 	 2000,
  number =	 {2000/71}
}