@article{NUMA_1990__57_6-7_133441,
     author = {A.G. Ramm and A. van der Sluis},
     title = {Calculating {Singular} {Integrals} as an {Ill-posed} {Problem.}},
     journal = {Numerische Mathematik},
     pages = {139--146},
     publisher = {mathdoc},
     volume = {57},
     number = {6-7},
     year = {1990},
     zbl = {0697.65005},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1990__57_6-7_133441/}
}