@article{1183529035, author = {Neuberger, J. W.}, title = {Symmetry in nonselfadjoint Sturm-Liouville systems}, journal = {Bull. Amer. Math. Soc.}, volume = {73}, number = {6}, year = {1967}, pages = { 701-703}, language = {en}, url = {http://dml.mathdoc.fr/item/1183529035} }
Neuberger, J. W. Symmetry in nonselfadjoint Sturm-Liouville systems. Bull. Amer. Math. Soc., Tome 73 (1967) no. 6, pp. 701-703. http://gdmltest.u-ga.fr/item/1183529035/