@techreport{ZschiedrichKloseSchaedleetal.2003, author = {Lin Zschiedrich and Roland Klose and Achim Sch{\"a}dle and Frank Schmidt}, title = {A new Finite Element realization of the Perfectly Matched Layer Method for Helmholtz scattering problems on polygonal domains in 2D}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {03-44}, language = {eng}, year = {2003} }