@article{1365484,
      recid = {1365484},
      author = {Iooss, Gérard, and Plotnikov, Pavel I.,},
      title = {Small divisor problem in the theory of three-dimensional  water gravity waves /},
      pages = {1 online resource (144 pages).},
      note = {"Volume 200, Number 940 (fifth of 6 numbers )."},
      url = {http://library.usi.edu/record/1365484},
}