@article{NUMA_1975__25_132379,
     author = {J.A. Nitsche},
     title = {Der {Einflu{\ss}} von {Randsingularit\"aten} beim {Ritzschen} {Verfahren.}  - {Solution} {Effects} of the {Ritz} {Method.}},
     journal = {Numerische Mathematik},
     pages = {263--278},
     publisher = {mathdoc},
     volume = {25},
     year = {1975},
     zbl = {0326.65062},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1975__25_132379/}
}