@article{3242,
author = {Ramos, M.},
title = {Periodic solutions of higher order ordinary differential equations with one-sided growth restrictions on the nonlinear term},
journal = {Portugaliae mathematica},
volume = {47},
year = {1990},
pages = {431-436},
zbl = {0714.34068},
mrnumber = {1090481},
language = {en},
url = {http://dml.mathdoc.fr/item/3242}
}
Ramos, M. Periodic solutions of higher order ordinary differential equations with one-sided growth restrictions on the nonlinear term. Portugaliae mathematica, Tome 47 (1990) pp. 431-436. http://gdmltest.u-ga.fr/item/3242/