@article{NUMA_1972__20_132195,
     author = {Franz Locher},
     title = {Zur {Struktur} von {Quadraturformeln.}},
     journal = {Numerische Mathematik},
     pages = {317--326},
     publisher = {mathdoc},
     volume = {20},
     year = {1972},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1972__20_132195/}
}