TY  - JOUR
AU  - Zofia Adamowicz
TI  - A recursion-theoretic characterization of instances of $ΒΣ_n$ provable in $П_{n+1}(N)$
JO  - Fundamenta Mathematicae
PY  - 1988
SP  - 231
EP  - 236
VL  - 129
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-129-3-231-236/
DO  - 10.4064/fm-129-3-231-236
LA  - en
ID  - 10_4064_fm_129_3_231_236
ER  -