@article{ZNSL_1999_253_a0,
     author = {D. K. Ozerov and Yu. A. Surkov},
     title = {On the influence of thin layers on the leading phases of a direct wave},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--11},
     publisher = {mathdoc},
     volume = {253},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1999_253_a0/}
}