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@article{CMH_1973__48_139556, author = {Hilbert Levitz}, title = {A {Characterization} of the {Veblen-Sch\"utte} {Functions} by {Means} of {Functionals}}, journal = {Commentarii mathematici Helvetici}, pages = {382--393}, publisher = {mathdoc}, volume = {48}, year = {1973}, zbl = {0272.02051}, url = {http://geodesic.mathdoc.fr/item/CMH_1973__48_139556/} }
Hilbert Levitz. A Characterization of the Veblen-Schütte Functions by Means of Functionals. Commentarii mathematici Helvetici, Tome 48 (1973), pp. 382-393. http://geodesic.mathdoc.fr/item/CMH_1973__48_139556/