Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS2_1956__4_165620, author = {VOJISLAV G. AVAKUMOVIC}, title = {\"Uber die {Eigenwerte} der {Schwingungsgleichung}}, journal = {Mathematica Scandinavica}, pages = {161--173}, publisher = {mathdoc}, volume = {4}, year = {1956}, zbl = {0075.27802}, url = {http://geodesic.mathdoc.fr/item/MS2_1956__4_165620/} }
VOJISLAV G. AVAKUMOVIC. Über die Eigenwerte der Schwingungsgleichung. Mathematica Scandinavica, Tome 4 (1956), pp. 161-173. http://geodesic.mathdoc.fr/item/MS2_1956__4_165620/