@article{NUMA_1984__44_132917,
     author = {Walter Gautschi},
     title = {Discrete {Approximations} to {Spherically} {Symmetric} {Distributions.}},
     journal = {Numerische Mathematik},
     pages = {53--60},
     year = {1984},
     volume = {44},
     zbl = {0508.65012},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1984__44_132917/}
}