TY - JOUR AU - B. Herrera AU - A. Samper TI - Definition and Calculation of an Eight-Centered Oval which is Quasi-Equivalent to the Ellipse JO - Journal for geometry and graphics PY - 2015 SP - 257 EP - 268 VL - 19 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JGG_2015_19_2_JGG_2015_19_2_a8/ ID - JGG_2015_19_2_JGG_2015_19_2_a8 ER -