@article{NUMA_1965__7_131657,
     author = {G. H\"AMMERLIN},
     title = {\"Uber ableitungsfreie {Schranken} f\"ur {Quadraturfehler.} {II.} {Erg\"anzungen} und {M\"oglichkeiten} zur {Verbesserung} .},
     journal = {Numerische Mathematik},
     pages = {232--237},
     publisher = {mathdoc},
     volume = {7},
     year = {1965},
     zbl = {0221.65036},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1965__7_131657/}
}