@article{DAN_1997_352_2_a4,
     author = {V. P. Maslov and O. Yu. Shvedov},
     title = {On some identities for the asymptotic behaviors of solutions of},
     journal = {Doklady Akademii Nauk},
     pages = {167--171},
     year = {1997},
     volume = {352},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1997_352_2_a4/}
}