@article{MZM_1993_54_3_a6,
     author = {I. M. Oleinik},
     title = {On the essential self-adjointness of the {Schr\"odinger} operator on complete {Riemannian} manifolds},
     journal = {Matemati\v{c}eskie zametki},
     pages = {89--97},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1993_54_3_a6/}
}