TY  - JOUR
AU  - Andrzej Pelc
TI  - Ideals on the real line and Ulam's problem
JO  - Fundamenta Mathematicae
PY  - 1981
SP  - 165
EP  - 170
VL  - 112
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-112-3-165-170/
DO  - 10.4064/fm-112-3-165-170
LA  - en
ID  - 10_4064_fm_112_3_165_170
ER  -