TY  - JOUR
AU  - Joan Bagaria
AU  - Saharon Shelah
TI  - On partial orderings having precalibre-$\aleph _1$ and
 fragments of Martin's axiom
JO  - Fundamenta Mathematicae
PY  - 2016
SP  - 181
EP  - 197
VL  - 232
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm232-2-6/
DO  - 10.4064/fm232-2-6
LA  - en
ID  - 10_4064_fm232_2_6
ER  -