Mario PoncePatricio SantibáñezOn Equidistant Sets and Generalized Conics: The Old and the New.18-322014121Am. Math. Mon.1https://doi.org/10.4169/amer.math.monthly.121.01.018https://www.wikidata.org/entity/Q58280243db/journals/tamm/tamm121.html#PonceS14