@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/