@article{JGG_2002_6_1_a1,
     author = {J. Beban-Brkic},
     title = {Isometric {Invariants} of {Conics} in the {Isotropic} {Plane} --- {Classification} of {Conics}},
     journal = {Journal for geometry and graphics},
     pages = {017--026},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {2002},
     url = {http://geodesic.mathdoc.fr/item/JGG_2002_6_1_a1/}
}