@article{1077475021, author = {Hartman, Philip}, title = {Differential equations with non-oscillatory eigenfunctions}, journal = {Duke Math. J.}, volume = {15}, number = {1}, year = {1948}, pages = { 697-709}, language = {en}, url = {http://dml.mathdoc.fr/item/1077475021} }
Hartman, Philip. Differential equations with non-oscillatory eigenfunctions. Duke Math. J., Tome 15 (1948) no. 1, pp. 697-709. http://gdmltest.u-ga.fr/item/1077475021/