@article{GDZPPN00242018X, title = {Deficiency Indices of Singular Schr\"odinger Operators.}, journal = {Mathematische Zeitschrift}, volume = {162}, year = {1978}, pages = {87-98}, zbl = {0353.35033}, url = {http://dml.mathdoc.fr/item/GDZPPN00242018X} }
Behncke, Horst; Focke, Heinz. Deficiency Indices of Singular Schrödinger Operators.. Mathematische Zeitschrift, Tome 162 (1978) pp. 87-98. http://gdmltest.u-ga.fr/item/GDZPPN00242018X/