@article{1365553,
      recid = {1365553},
      author = {González-Enríquez, A. and Haro, A. and De la Llave,  Rafael,},
      title = {Singularity theory for non-twist KAM tori /},
      pages = {1 online resource (128 pages) :},
      note = {"Volume 227, Number 1067 (third of 4 numbers)."},
      url = {http://library.usi.edu/record/1365553},
}