@article{10_2298_TAM1501001R,
     author = {Milena Radnovi\'c},
     title = {Topology of the elliptical billiard with the {Hooke's} potential},
     journal = {Theoretical and applied mechanics},
     pages = {1 },
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {2015},
     doi = {10.2298/TAM1501001R},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/TAM1501001R/}
}