@article{NUMA_1989__54_3_133310,
     author = {G. Schmidt and H. Strese},
     title = {The {Convergence} of a {Direct} {BEM} for the {Plane} {Mixed} {Boundary} {Value} {Problem} of the {Laplacian.}},
     journal = {Numerische Mathematik},
     pages = {145--166},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {1989},
     zbl = {0661.65116},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1989__54_3_133310/}
}