@article{JRAM_1985__362_152765,
     author = {F. Gesztesy and W. Kirsch},
     title = {One-dimensional {Schr\"odinger} operators with interactions singular on a discrete set.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {28--50},
     publisher = {mathdoc},
     volume = {362},
     year = {1985},
     zbl = {0565.34018},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1985__362_152765/}
}