@article{GDZPPN002346214,
title = {Bounds for the Discrete Part of the Spectrum of a Semi-Bounded Schr\"odinger Operator.},
journal = {Mathematica Scandinavica},
volume = {8},
year = {1960},
pages = {143-153},
zbl = {0145.14901},
url = {http://dml.mathdoc.fr/item/GDZPPN002346214}
}
Persson, Arne. Bounds for the Discrete Part of the Spectrum of a Semi-Bounded Schrödinger Operator.. Mathematica Scandinavica, Tome 8 (1960) pp. 143-153. http://gdmltest.u-ga.fr/item/GDZPPN002346214/