@article{JGG_2020_24_1_JGG_2020_24_1_a7,
     author = {D. S. Reznik and R. Garcia and J. Koiller },
     title = {The {Ballet} of {Triangle} {Centers} on the {Elliptic} {Billiard}},
     journal = {Journal for geometry and graphics},
     pages = {79--101},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {2020},
     url = {http://geodesic.mathdoc.fr/item/JGG_2020_24_1_JGG_2020_24_1_a7/}
}