@article{VMUMM_2018_4_a3,
     author = {V. V. Vedyushkina},
     title = {Fomenko--Zieschang invariants of topological billiards bounded by confocal parabolas},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {22--28},
     publisher = {mathdoc},
     number = {4},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2018_4_a3/}
}