@article{TIMM_2017_23_2_a20,
     author = {O. Yu. Khachay},
     title = {Asymptotics of a solution of a three-dimensional nonlinear wave equation near a butterfly catastrophe point},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {250--265},
     year = {2017},
     volume = {23},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2017_23_2_a20/}
}