@article{GDZPPN002206803,
title = {On the asymptotic distribution of the eigenvalue branches of the Schr\"odinger operator H... W in a spectral gap of H.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {394},
year = {1989},
pages = {38-59},
zbl = {0681.35066},
url = {http://dml.mathdoc.fr/item/GDZPPN002206803}
}
Hempel, Rainer. On the asymptotic distribution of the eigenvalue branches of the Schrödinger operator H... W in a spectral gap of H.. Journal für die reine und angewandte Mathematik, Tome 394 (1989) pp. 38-59. http://gdmltest.u-ga.fr/item/GDZPPN002206803/