@article{AIHPC_1992__9_1_13_0,
     author = {Aubin, Jean-Pierre and Da Prato, Guiseppe},
     title = {Contingent solutions to the center manifold equation},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {13--28},
     year = {1992},
     publisher = {Gauthier-Villars},
     volume = {9},
     number = {1},
     mrnumber = {1151465},
     zbl = {0745.34039},
     language = {en},
     url = {https://www.numdam.org/item/AIHPC_1992__9_1_13_0/}
}