@article{IVM_2008_3_a2,
     author = {P. D. Lebedev and A. A. Uspenskii},
     title = {Geometry and the asymptotics of wave forms},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {27--37},
     publisher = {mathdoc},
     number = {3},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2008_3_a2/}
}