@techreport{SchmidtFrieseYevick1999, author = {Frank Schmidt and Tilmann Friese and David Yevick}, title = {Transparent Boundary Conditions for Split-Step Pade Approximations of the One-Way Helmholtz Equation}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-99-46}, language = {eng}, year = {1999} }