@article{02217492,
title = {Periodic boundary value problems for },
journal = {Journal of Applied Mathematics},
volume = {2005},
year = {2005},
pages = {1-21},
doi = {10.1155/JAM.2005.1},
zbl = {1088.34013},
language = {en},
url = {http://dml.mathdoc.fr/item/02217492}
}
Liu, Yuji; Ge, Weigao. Periodic boundary value problems for . Journal of Applied Mathematics, Tome 2005 (2005) pp. 1-21. doi : 10.1155/JAM.2005.1. http://gdmltest.u-ga.fr/item/02217492/