@article{bwmeta1.element.desklight-f5faa36b-10df-43fd-b9c4-00777db241e4,
author = {D. Willett},
title = {On the oscillatory behavior of the solutions of second order linear differential equations},
journal = {Annales Polonici Mathematici},
volume = {21},
year = {1969},
pages = {175-194},
zbl = {0174.13701},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-f5faa36b-10df-43fd-b9c4-00777db241e4}
}
D. Willett. On the oscillatory behavior of the solutions of second order linear differential equations. Annales Polonici Mathematici, Tome 21 (1969) pp. 175-194. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-f5faa36b-10df-43fd-b9c4-00777db241e4/