@article{AA_1991_3_4_a1,
     author = {R. F. Bikbaev and V. O. Tarasov},
     title = {An inhomogeneous boundary value problem on the semi-axis and on a~segment for the {sine-Gordon} equation},
     journal = {Algebra i analiz},
     pages = {78--92},
     publisher = {mathdoc},
     volume = {3},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1991_3_4_a1/}
}