@article{SM_1992_72_1_a11,
     author = {I. K. Babenko},
     title = {On the behavior of trajectories of scattering billiards on the flat torus},
     journal = {Sbornik. Mathematics},
     pages = {207--220},
     publisher = {mathdoc},
     volume = {72},
     number = {1},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1992_72_1_a11/}
}