@article{RM_1978_33_4_a17,
     author = {N. V. Svanidze},
     title = {The existence of~invariant tori for~the~three-dimensional motion of~a billiard ball that are concentrated in~a~neighbourhood of~a ``closed geodesic on the boundary of the domain''},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {267--268},
     publisher = {mathdoc},
     volume = {33},
     number = {4},
     year = {1978},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1978_33_4_a17/}
}