@article{DE_1998_34_4_a9,
     author = {V. F. Volkodavov and V. E. Zhukov},
     title = {Two problems for the string vibration equation with integral conditions and special conjugation conditions on the characteristic},
     journal = {Differencialʹnye uravneni\^a},
     pages = {503--507},
     publisher = {mathdoc},
     volume = {34},
     number = {4},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_4_a9/}
}