@article{MAN_1937__113_159887,
     author = {E. H\"older},
     title = {\"Uber die {Vielfachheiten} gest\"orter {Eigenwerte.}},
     journal = {Mathematische Annalen},
     pages = {DCXX--DCXXVII},
     year = {1937},
     volume = {113},
     zbl = {0016.06302},
     url = {http://geodesic.mathdoc.fr/item/MAN_1937__113_159887/}
}