@article{DE_2005_41_6_a5,
     author = {V. B. Levenshtam},
     title = {Asymptotic {Integration} of {Differential} {Equations} with {Oscillatory} {Terms} of {Large} {Amplitudes:} {I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {761--770},
     publisher = {mathdoc},
     volume = {41},
     number = {6},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2005_41_6_a5/}
}