On second order periodic boundary-value problems with upper and lower solutions in the reversed order.
Gao, Haiyin ; Weng, Shiyou ; Jiang, Daqing ; Hou, Xuezhang
Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2006 (2006), / Harvested from The Electronic Library of Mathematics
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Publié le : 2006-01-01
EUDML-ID : urn:eudml:doc:126428 
@article{05016758,
     title = {On second order periodic boundary-value problems with upper and lower solutions in the reversed order.},
     journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
     volume = {2006},
     year = {2006},
     zbl = {1096.34010},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05016758}
}

Gao, Haiyin; Weng, Shiyou; Jiang, Daqing; Hou, Xuezhang. On second order periodic boundary-value problems with upper and lower solutions in the reversed order.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2006 (2006) . http://gdmltest.u-ga.fr/item/05016758/