@article{DE_1988_24_10_a17,
     author = {R. N. Khubiev},
     title = {A boundary value problem with a free boundary for the one-dimensional wave equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1801--1804},
     publisher = {mathdoc},
     volume = {24},
     number = {10},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_10_a17/}
}