%0 Journal Article %A Frolík, Zdeněk %T On two problems of W. W. Comfort %J Commentationes Mathematicae Universitatis Carolinae %D 1967 %P 139-144 %V 08 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1967__8_1_a10/ %G en %F CMUC_1967__8_1_a10