@article{ZNSL_2000_264_a1,
     author = {V. M. Babich and V. V. Kamotskii},
     title = {On the wave field in the small neighbourhood of the point of incidence of the limiting ray},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {22--32},
     year = {2000},
     volume = {264},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_264_a1/}
}