TY  - JOUR
AU  - Z. Ratajczyk
TI  - A combinatorial analysis of functions provably recursive in $ΙΣ_n$
JO  - Fundamenta Mathematicae
PY  - 1988
SP  - 191
EP  - 213
VL  - 130
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-130-3-191-213/
DO  - 10.4064/fm-130-3-191-213
LA  - en
ID  - 10_4064_fm_130_3_191_213
ER  -