@article{GDZPPN002334259,
title = {Perturbation by differences of unbounded potentials.},
journal = {Mathematische Annalen},
volume = {287},
year = {1990},
pages = {553-570},
zbl = {0685.31005},
url = {http://dml.mathdoc.fr/item/GDZPPN002334259}
}
Hansen, W.; Ma, Z. Perturbation by differences of unbounded potentials.. Mathematische Annalen, Tome 287 (1990) pp. 553-570. http://gdmltest.u-ga.fr/item/GDZPPN002334259/