@techreport{OevermannScharfenbergKlein2008, author = {Michael Oevermann and Carsten Scharfenberg and Rupert Klein}, title = {A sharp interface finite volume method for elliptic equations on Cartesian grids}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {08-38}, language = {eng}, year = {2008} }