@article{EJDE_1999__1999__a126,
     author = {Zeng,  Chongchun},
     title = {Persistence of invariant manifolds for perturbations of semiflows with symmetry},
     journal = {Electronic journal of differential equations},
     year = {1999},
     volume = {1999},
     zbl = {0916.58034},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_1999__1999__a126/}
}