@article{FAA_2001_35_3_a4,
     author = {Yu. N. Fedorov},
     title = {An {Ellipsoidal} {Billiard} with a {Quadratic} {Potential}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {48--59},
     publisher = {mathdoc},
     volume = {35},
     number = {3},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2001_35_3_a4/}
}