@article{GDZPPN002419521,
title = {On Non-Degeneracy of the Ground State of Schr\"odinger Operators.},
journal = {Mathematische Zeitschrift},
volume = {154},
year = {1977},
pages = {239-248},
zbl = {0353.35032},
url = {http://dml.mathdoc.fr/item/GDZPPN002419521}
}
Goelden, Heinz-Willi. On Non-Degeneracy of the Ground State of Schrödinger Operators.. Mathematische Zeitschrift, Tome 154 (1977) pp. 239-248. http://gdmltest.u-ga.fr/item/GDZPPN002419521/