@article{GDZPPN002295229, title = {S-hermitesche Rand-Eigenwertprobleme. I.}, journal = {Mathematische Annalen}, volume = {161}, year = {1965}, pages = {9-26}, url = {http://dml.mathdoc.fr/item/GDZPPN002295229} }
Schäfke, F.W.; SCHNEIDER, A. S-hermitesche Rand-Eigenwertprobleme. I.. Mathematische Annalen, Tome 161 (1965) pp. 9-26. http://gdmltest.u-ga.fr/item/GDZPPN002295229/