Colton, D., & Wendland, W. L. (1975). Constructive methods for solving the exterior Neumann problem for the reduced wave equation in a spherically symmetric medium. Techn. Hochsch.
Chicago Style (17th ed.) CitationColton, David, and Wolfgang L. Wendland. Constructive Methods for Solving the Exterior Neumann Problem for the Reduced Wave Equation in a Spherically Symmetric Medium. Darmstadt: Techn. Hochsch, 1975.
MLA (9th ed.) CitationColton, David, and Wolfgang L. Wendland. Constructive Methods for Solving the Exterior Neumann Problem for the Reduced Wave Equation in a Spherically Symmetric Medium. Techn. Hochsch, 1975.
Warning: These citations may not always be 100% accurate.