%0 Journal Article %A Kolář, Ivan %T On Lenz's problem on the independence of the axioms of affine space %J Commentationes Mathematicae Universitatis Carolinae %D 1965 %P 339-346 %V 06 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1965__6_3_a3/ %G en %F CMUC_1965__6_3_a3