@article{SM_2022_213_9_a1,
     author = {V. Dragovi\'c and S. Gasiorek and M. Radnovi\'c},
     title = {Integrable billiards on {a~Minkowski} hyperboloid: extremal polynomials and topology},
     journal = {Sbornik. Mathematics},
     pages = {1187--1221},
     publisher = {mathdoc},
     volume = {213},
     number = {9},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2022_213_9_a1/}
}