@article{2869,
author = {Taylor, W.E. jr.},
title = {On the oscillation of a fourth order differential equation and its adjoint},
journal = {Portugaliae mathematica},
volume = {37},
year = {1978},
pages = {299-305},
zbl = {0504.34017},
mrnumber = {0633035},
language = {en},
url = {http://dml.mathdoc.fr/item/2869}
}
Taylor, W.E. jr. On the oscillation of a fourth order differential equation and its adjoint. Portugaliae mathematica, Tome 37 (1978) pp. 299-305. http://gdmltest.u-ga.fr/item/2869/