%0 Journal Article %A Ehrhard Behrends %T Where is pointwise multiplication in real $CK$-spaces locally open? %J Fundamenta Mathematicae %D 2017 %P 51-69 %V 236 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm121-1-2016/ %R 10.4064/fm121-1-2016 %G en %F 10_4064_fm121_1_2016