@article{MZM_2011_89_6_a11,
     author = {N. L. Chuprikov},
     title = {The {WKB} {Method} and {Differential} {Consequences} of the {Riccati} {Equation}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {929--937},
     publisher = {mathdoc},
     volume = {89},
     number = {6},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_89_6_a11/}
}