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@article{MAN_1977__227_162972, author = {Ian Knowles}, title = {On {Essential} {Self-Adjointness} for {Singular} {Elliptic} {Differential} {Operators.}}, journal = {Mathematische Annalen}, pages = {155--172}, publisher = {mathdoc}, volume = {227}, year = {1977}, zbl = {0344.35026}, url = {http://geodesic.mathdoc.fr/item/MAN_1977__227_162972/} }
Ian Knowles. On Essential Self-Adjointness for Singular Elliptic Differential Operators.. Mathematische Annalen, Tome 227 (1977), pp. 155-172. http://geodesic.mathdoc.fr/item/MAN_1977__227_162972/