@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}, zbl = {06444426}, mrnumber = {3325239}, language = {en}, url = {http://archive.numdam.org/articles/10.1016/j.anihpc.2013.12.001/} }