@article{02186432,
title = {Periodic solutions of a high order equation with deviating arguments.},
journal = {Mathematica Pannonica},
volume = {15},
year = {2004},
pages = {259-264},
zbl = {1062.34074},
language = {en},
url = {http://dml.mathdoc.fr/item/02186432}
}
Lin, Wen-Xian. Periodic solutions of a high order equation with deviating arguments.. Mathematica Pannonica, Tome 15 (2004) pp. 259-264. http://gdmltest.u-ga.fr/item/02186432/