@article{GDZPPN002202859,
title = {One-dimensional Schr\"odinger operators with interactions singular on a discrete set.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {358},
year = {1985},
pages = {28-50},
zbl = {0565.34018},
url = {http://dml.mathdoc.fr/item/GDZPPN002202859}
}
Gesztesy, F.; Kirsch, W. One-dimensional Schrödinger operators with interactions singular on a discrete set.. Journal für die reine und angewandte Mathematik, Tome 358 (1985) pp. 28-50. http://gdmltest.u-ga.fr/item/GDZPPN002202859/