@article{ZNSL_2010_379_a6,
     author = {A. A. Fedotov},
     title = {Complex {WKB} method for adiabatic perturbations of a~periodic {Schr\"odinger} operator},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {142--178},
     year = {2010},
     volume = {379},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2010_379_a6/}
}