@article{PM_1997_1997_1_a2,
     author = {Llibre, Jaume and Ponce, Enrique},
     title = {Bifurcaci\'on de {Hoptf} desde el infinito para sistemas planos de control.},
     journal = {Publicacions matem\`atiques},
     pages = {181-198},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1997_1997_1_a2/}
}