@article{JRAM_1932__166_183473,
     author = {B. Gagaeff},
     title = {\"Uber {Sturm-Liouvillesche} {Reihen} mit {L\"ucken.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {204--207},
     publisher = {mathdoc},
     volume = {166},
     year = {1932},
     zbl = {0004.05902},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1932__166_183473/}
}