@article{DE_1979_15_8_a18,
     author = {A. G. Prudkovskii},
     title = {The {WKB} method for a system of {Schr\"odinger} equations and the order of its accuracy in the case of characteristics of variable multiplicity},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1522--1525},
     publisher = {mathdoc},
     volume = {15},
     number = {8},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_8_a18/}
}