@article{FPM_2015_20_3_a6,
     author = {E. A. Kudryavtseva},
     title = {Liouville integrable generalized billiard flows and {Poncelet} type theorems},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {113--152},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2015_20_3_a6/}
}