@article{NUMA_1985__47_133041,
     author = {Helmut Brass},
     title = {Eine {Fehlerabsch\"atzung} f\"ur positive {Quadraturformeln.}},
     journal = {Numerische Mathematik},
     pages = {395--400},
     publisher = {mathdoc},
     volume = {47},
     year = {1985},
     zbl = {0568.41027},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1985__47_133041/}
}