@article{CRMATH_2004__339_12_831_0,
     author = {Iooss, G\'erard and Lombardi, Eric},
     title = {Normal forms with exponentially small remainder: application to homoclinic connections for the reversible $ {0}^{2+}\mathrm{i}\omega $ resonance},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {831--838},
     publisher = {Elsevier},
     volume = {339},
     number = {12},
     year = {2004},
     doi = {10.1016/j.crma.2004.10.002},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2004.10.002/}
}