@article{MAN_1973__201_162387,
     author = {B. Simon},
     title = {Essential {Self-Adjointness} of {Schr\"odinger} {Operators} with {Positive} {Potentials.}},
     journal = {Mathematische Annalen},
     pages = {211--220},
     publisher = {mathdoc},
     volume = {201},
     year = {1973},
     zbl = {0234.47027},
     url = {http://geodesic.mathdoc.fr/item/MAN_1973__201_162387/}
}