@article{TMF_1993_96_1_a7,
     author = {I. T. Habibullin},
     title = {Boundary conditions for nonlinear equations compatible with integrability},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {109--122},
     publisher = {mathdoc},
     volume = {96},
     number = {1},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1993_96_1_a7/}
}