@article{ZVMMF_1968_8_2_a17,
     author = {N. I. Zhirnov},
     title = {On the investigation of the asymptotic properties of solutions of the wave equation at singular points of the potential},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {443--447},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1968_8_2_a17/}
}