@techreport{RuprechtSchaedleSchmidtetal.2007, author = {Daniel Ruprecht and Achim Sch{\"a}dle and Frank Schmidt and Lin Zschiedrich}, title = {Transparent boundary conditons for time-dependent problems}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {07-12}, language = {eng}, year = {2007} }