TY  - JOUR
AU  - Teruyuki Yorioka
TI  - Keeping the covering number of the null ideal small
JO  - Fundamenta Mathematicae
PY  - 2015
SP  - 139
EP  - 159
VL  - 231
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm231-2-3/
DO  - 10.4064/fm231-2-3
LA  - en
ID  - 10_4064_fm231_2_3
ER  -