@article{DAN_1995_345_5_a1,
     author = {S. P. Bautin},
     title = {The {Cauchy} problem with initial data on different surfaces},
     journal = {Doklady Akademii Nauk},
     pages = {586--589},
     year = {1995},
     volume = {345},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_345_5_a1/}
}