@article{SM_2006_197_6_a2,
     author = {S. V. Zakharov},
     title = {Asymptotic solution of a {Cauchy} problem in a neighbourhood},
     journal = {Sbornik. Mathematics},
     pages = {835--851},
     year = {2006},
     volume = {197},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2006_197_6_a2/}
}