@article{AIHPC_2015__32_2_307_0,
     author = {Gavrilov, Lubomir and Iliev, Iliya D.},
     title = {Perturbations of quadratic {Hamiltonian} two-saddle cycles},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {307--324},
     publisher = {Elsevier},
     volume = {32},
     number = {2},
     year = {2015},
     doi = {10.1016/j.anihpc.2013.12.001},
     mrnumber = {3325239},
     zbl = {06444426},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2013.12.001/}
}