TY  - JOUR
AU  - Saharon Shelah
TI  - The spectrum of characters of ultrafilters on 
$\omega$
JO  - Colloquium Mathematicum
PY  - 2008
SP  - 213
EP  - 220
VL  - 111
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm111-2-5/
DO  - 10.4064/cm111-2-5
LA  - en
ID  - 10_4064_cm111_2_5
ER  -