%0 Journal Article %A Flašková, Jana %T A note on $\Cal J$-ultrafilters and $P$-points %J Acta Universitatis Carolinae. Mathematica et Physica %D 2007 %P 43-48 %V 48 %N 2 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/AUCMP_2007__48_2_a4/ %G en %F AUCMP_2007__48_2_a4