@article{NUMA_1986__49_133102,
     author = {Walter Gautschi and G.V. Milovanovic},
     title = {Spline {Approximations} to {Spherically} {Symmetric} {Distributions.}},
     journal = {Numerische Mathematik},
     pages = {111--122},
     year = {1986},
     volume = {49},
     zbl = {0586.41009},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1986__49_133102/}
}