@article{NUMA_1968__12_131846,
     author = {K.P. HADELER},
     title = {Newton-Verfahren f\"ur inverse {Eigenwertaufgaben.}},
     journal = {Numerische Mathematik},
     pages = {35--39},
     publisher = {mathdoc},
     volume = {12},
     year = {1968},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1968__12_131846/}
}