@article{NUMA_1978__30_132538,
     author = {R. Menzel and H. Schwetlick},
     title = {Zur  {L\"osung}  parameterabh\"angiger nichtlinearer  {Gleichungen} mit singul\"aren {Jacobi-Matrizen.}},
     journal = {Numerische Mathematik},
     pages = {65--80},
     publisher = {mathdoc},
     volume = {30},
     year = {1978},
     zbl = {0425.65032},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1978__30_132538/}
}