@article{AFST_1997_6_6_4_711_0,
     author = {Leonardo Mora and Neptal{\'\i} Romero},
     title = {Persistence of homoclinic tangencies for area-preserving maps},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {711--725},
     year = {1997},
     publisher = {Universit\'e Paul Sabatier},
     address = {Toulouse},
     volume = {Ser. 6, 6},
     number = {4},
     doi = {10.5802/afst.885},
     mrnumber = {1624318},
     zbl = {0932.37033},
     language = {en},
     url = {https://afst.centre-mersenne.org/articles/10.5802/afst.885/}
}