@article{JRAM_1963__212_150580,
     author = {Konrad J\"orgens},
     title = {\"Uber die numerische {Behandlung} singul\"arer {Sturm-Liouville-Probleme.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {183--200},
     publisher = {mathdoc},
     volume = {212},
     year = {1963},
     zbl = {0112.35004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1963__212_150580/}
}