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@article{MZ_1978__158_172622, author = {Horst Behncke and Heinz Focke}, title = {Deficiency {Indices} of {Singular} {Schr\"odinger} {Operators.}}, journal = {Mathematische Zeitschrift}, pages = {87--98}, publisher = {mathdoc}, volume = {158}, year = {1978}, zbl = {0353.35033}, url = {http://geodesic.mathdoc.fr/item/MZ_1978__158_172622/} }
Horst Behncke; Heinz Focke. Deficiency Indices of Singular Schrödinger Operators.. Mathematische Zeitschrift, Tome 158 (1978), pp. 87-98. http://geodesic.mathdoc.fr/item/MZ_1978__158_172622/