@techreport{KornhuberWittum1992, author = {Ralf Kornhuber and Gabriel Wittum}, title = {Discretization and Iterative Solution of Convection Diffusion Equations.}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-92-06}, language = {eng}, year = {1992} }