TY  - JOUR
AU  - W. Marek
TI  - Stable sets, a characterization of $β_2$-models of full second order arithmetic and some related facts
JO  - Fundamenta Mathematicae
PY  - 1974
SP  - 175
EP  - 189
VL  - 82
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-82-2-175-189/
DO  - 10.4064/fm-82-2-175-189
LA  - en
ID  - 10_4064_fm_82_2_175_189
ER  -