@article{ZNSL_1999_257_a9,
     author = {M. A. Lyalinov},
     title = {On scattering of waves by a slowly expanding contour},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {149--156},
     year = {1999},
     volume = {257},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1999_257_a9/}
}