@article{FrieseSchmidtYevick2000, author = {T. Friese and Frank Schmidt and David Yevick}, title = {Transparent boundary conditions for a wide-angle approximation of the one-way Helmholtz equation}, journal = {J. Comput. Phys.}, volume = {165}, number = {2}, pages = {645 -- 659}, doi = {10.1006/jcph.2000.6637}, year = {2000}, }