@article{NUMA_1992__63_1_133679,
     author = {U. Mertins},
     title = {Asymptotische {Fehlerschranken} f\"ur {Rayleigh-Ritz-Approximationen} selbstadjungierter {Eigenwertaufgaben.}},
     journal = {Numerische Mathematik},
     pages = {227--242},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {1992},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1992__63_1_133679/}
}