TY  - JOUR
AU  - Andrzej Zarach
TI  - Forcing with proper classes
JO  - Fundamenta Mathematicae
PY  - 1973
SP  - 1
EP  - 27
VL  - 81
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-81-1-1-27/
DO  - 10.4064/fm-81-1-1-27
LA  - en
ID  - 10_4064_fm_81_1_1_27
ER  -