@article{NUMA_1979__33_132625,
     author = {L.L. Schumaker and G. H\"ammerlin},
     title = {Error {Bounds} for the {Approximation} of {Green's} {Kernels} by {Splines.}},
     journal = {Numerische Mathematik},
     pages = {17--22},
     publisher = {mathdoc},
     volume = {33},
     year = {1979},
     zbl = {0437.65101},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1979__33_132625/}
}