@article{DANMA_2021_496_a0,
     author = {V. V. Vedyushkina and A. T. Fomenko},
     title = {Force evolutionary billiards and billiard equivalence of the {Euler} and {Lagrange} cases},
     journal = {Doklady Rossijskoj akademii nauk. Matematika, informatika, processy upravleni\^a},
     pages = {5--9},
     publisher = {mathdoc},
     volume = {496},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DANMA_2021_496_a0/}
}