Yonglin Li,  Weiying Zheng &  Xiaopeng Zhu. (2020). A CIP-FEM for High-Frequency Scattering Problem with the Truncated DtN Boundary Condition.
            <i>CSIAM Transactions on Applied Mathematics</i>. <i>1</i> (3).
            530-560.
         doi:10.4208/csiam-am.2020-0025