@article{GDZPPN002207257,
title = {Subsoluton estimates and Harnack's inequality for Schr\"odinger operators.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {405},
year = {1990},
pages = {118-134},
zbl = {0779.35026},
url = {http://dml.mathdoc.fr/item/GDZPPN002207257}
}
Hinz, A.M.; Kalf, H. Subsoluton estimates and Harnack's inequality for Schrödinger operators.. Journal für die reine und angewandte Mathematik, Tome 405 (1990) pp. 118-134. http://gdmltest.u-ga.fr/item/GDZPPN002207257/