@article{PM_2000_2000_1_a8,
     author = {Zhao, Yulin and Zhang, Zhifen},
     title = {Bifurcaciones de ciclos l{\'\i}mite a partir de sistemas hamiltonianos c\'ubicos con un centro y un ciclo silla homocl{\'\i}nico.},
     journal = {Publicacions matem\`atiques},
     pages = {205-235},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_2000_2000_1_a8/}
}