@article{ZNSL_2014_426_a7,
     author = {A. I. Korol'kov and A. V. Shanin},
     title = {Parabolic equation method and {Fresnel} approximation in {Weinstein's} problems},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {87--118},
     publisher = {mathdoc},
     volume = {426},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2014_426_a7/}
}