@article{EJDE_2011__2011__a96,
     author = {Da Cunha, Warley Ferreira and Dias, Fabio Scalco and Mello, Luis Fernando},
     title = {Centers on center manifolds in a quadratic system obtained froma scalar third-order differential equation},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2011},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2011__2011__a96/}
}