@article{NUMA_1967__10_131789,
     author = {N.J. LEHMANN},
     title = {Fehlerschranken f\"ur {N\"aherungsl\"osungen} bei  {Differentialgleichungen.}},
     journal = {Numerische Mathematik},
     pages = {261--288},
     publisher = {mathdoc},
     volume = {10},
     year = {1967},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1967__10_131789/}
}