@article{VMUMM_2025_2_a2,
     author = {M. A. Nikulin},
     title = {Elliptic billiard with cosine law of refraction on confocal quadrics},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {16--23},
     publisher = {mathdoc},
     number = {2},
     year = {2025},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2025_2_a2/}
}