@article{1103857514,
author = {Konrady, John},
title = {Almost positive perturbations of positive selfadjoint operators},
journal = {Comm. Math. Phys.},
volume = {20},
number = {1},
year = {1971},
pages = { 295-300},
language = {en},
url = {http://dml.mathdoc.fr/item/1103857514}
}
Konrady, John. Almost positive perturbations of positive selfadjoint operators. Comm. Math. Phys., Tome 20 (1971) no. 1, pp. 295-300. http://gdmltest.u-ga.fr/item/1103857514/