@article{JGG_2010_14_1_JGG_2010_14_1_a2,
     author = {B. Odehnal },
     title = {Equioptic {Curves} of {Conic} {Sections}},
     journal = {Journal for geometry and graphics},
     pages = {29--43},
     publisher = {mathdoc},
     volume = {14},
     number = {1},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/JGG_2010_14_1_JGG_2010_14_1_a2/}
}