%0 Journal Article %A Anderson, Robert L. %T Limit Point and Limit Circle Criteria for a Class of Singular Symmetric Differential Operators %J Canadian journal of mathematics %D 1976 %P 905-914 %V 28 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-088-1/ %R 10.4153/CJM-1976-088-1 %F 10_4153_CJM_1976_088_1