TY - JOUR AU - Hilbert Levitz TI - A Characterization of the Veblen-Schütte Functions by Means of Functionals JO - Commentarii mathematici Helvetici PY - 1973 SP - 382 EP - 393 VL - 48 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMH_1973__48_139556/ ID - CMH_1973__48_139556 ER -