TY  - JOUR
AU  - Georg Kreisel
TI  - Some concepts concerning formal systems on number theory.
JO  - Mathematische Zeitschrift
PY  - 1952
SP  - 1
EP  - 12
VL  - 57
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1952__57_169302/
ID  - MZ_1952__57_169302
ER  -