TY  - JOUR
AU  - Stahl, Stanley H.
TI  - A Hierarchy on the Class of Primitive Recursive Ordinal Functions
JO  - Canadian journal of mathematics
PY  - 1976
SP  - 1205
EP  - 1209
VL  - 28
IS  - 6
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-120-3/
DO  - 10.4153/CJM-1976-120-3
ID  - 10_4153_CJM_1976_120_3
ER  -