@article{ZNSL_1973_34_a3,
     author = {V. S. Buldyrev and A. I. Lanin},
     title = {On the limits of application of the acymptotic formula for the wave spreading along a~concave surface},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {52--71},
     publisher = {mathdoc},
     volume = {34},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1973_34_a3/}
}