@article{GDZPPN002479893, title = {Limit Circle Results for Second Order Equations.}, journal = {Monatshefte f\"ur Mathematik}, volume = {82}, year = {1976}, pages = {185-194}, zbl = {0339.34028}, url = {http://dml.mathdoc.fr/item/GDZPPN002479893} }
Patula, W.T.; Burton, T.A. Limit Circle Results for Second Order Equations.. Monatshefte für Mathematik, Tome 82 (1976) pp. 185-194. http://gdmltest.u-ga.fr/item/GDZPPN002479893/