@article{GDZPPN002345919, title = {Self-Adjointness and Spectra of Sturm-Liouville Operators.}, journal = {Mathematica Scandinavica}, volume = {7}, year = {1959}, pages = {219-240}, zbl = {0102.30102}, url = {http://dml.mathdoc.fr/item/GDZPPN002345919} }
Brinck, Inge. Self-Adjointness and Spectra of Sturm-Liouville Operators.. Mathematica Scandinavica, Tome 7 (1959) pp. 219-240. http://gdmltest.u-ga.fr/item/GDZPPN002345919/