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