@article{2828,
author = {Derrick, W.R.},
title = {Nonlinear functional Sturm-Liouville equations},
journal = {Portugaliae mathematica},
volume = {36},
year = {1977},
pages = {227-237},
zbl = {0451.34018},
mrnumber = {0597844},
language = {en},
url = {http://dml.mathdoc.fr/item/2828}
}
Derrick, W.R. Nonlinear functional Sturm-Liouville equations. Portugaliae mathematica, Tome 36 (1977) pp. 227-237. http://gdmltest.u-ga.fr/item/2828/