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@article{AM2_1971__7_136258, author = {J. ACZ\'EL}, title = {On a {Functional} {Equation} of the {Theory} of {Curves} in {Two} {Dimensional} {Conformal} {Geometry}}, journal = {Aequationes mathematicae}, pages = {246--248}, publisher = {mathdoc}, volume = {7}, year = {1971}, zbl = {0237.39009}, url = {http://geodesic.mathdoc.fr/item/AM2_1971__7_136258/} }
J. ACZÉL. On a Functional Equation of the Theory of Curves in Two Dimensional Conformal Geometry. Aequationes mathematicae, Tome 7 (1971), pp. 246-248. http://geodesic.mathdoc.fr/item/AM2_1971__7_136258/