@article{NUMA_1966__8_131696,
     author = {R. ANSORGE},
     title = {Zur {Frage} der {Verallgemeinerung} des {\"Aquivalenzsatzes} von {LAX.}},
     journal = {Numerische Mathematik},
     pages = {178--185},
     publisher = {mathdoc},
     volume = {8},
     year = {1966},
     zbl = {0136.12901},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1966__8_131696/}
}