@article{ZNSL_2003_300_a4,
     author = {V. F. Lazutkin},
     title = {Splitting of separatrices for the {Chirikov} standard map},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {25--55},
     publisher = {mathdoc},
     volume = {300},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2003_300_a4/}
}