@article{AA_2014_26_3_a1,
     author = {M. I. Belishev and A. L. Pestov},
     title = {Characterization of inverse data for one-dimensional two-velocity dynamical system},
     journal = {Algebra i analiz},
     pages = {89--130},
     publisher = {mathdoc},
     volume = {26},
     number = {3},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2014_26_3_a1/}
}