@article{NUMA_1974__22_132279,
     author = {P.H. Astor and C.S. Duris},
     title = {Discrete {L-Splines.}},
     journal = {Numerische Mathematik},
     pages = {393--402},
     year = {1974},
     volume = {22},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1974__22_132279/}
}