@article{NUMA_1990__57_6-7_133455,
     author = {T. von Petersdorff and E.P. Stephan},
     title = {On the {Convergence} of {Multi-Grid} {Methods} for a {Hypersingular} {Integral} {Equation} of the {First} {Kind.}},
     journal = {Numerische Mathematik},
     pages = {379--392},
     publisher = {mathdoc},
     volume = {57},
     number = {6-7},
     year = {1990},
     zbl = {0702.65102},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1990__57_6-7_133455/}
}