@article{NUMA_1978__30_132546,
     author = {K. Witsch},
     title = {Numerische {Quadratur} bei {Projektionsverfahren.}},
     journal = {Numerische Mathematik},
     pages = {185--206},
     publisher = {mathdoc},
     volume = {30},
     year = {1978},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1978__30_132546/}
}