TY - JOUR AU - J. ACZÉL TI - On a Functional Equation of the Theory of Curves in Two Dimensional Conformal Geometry JO - Aequationes mathematicae PY - 1971 SP - 246 EP - 248 VL - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AM2_1971__7_136258/ ID - AM2_1971__7_136258 ER -