%0 Journal Article %A Karl Menger %A H. Whitlock %T Two theorems on the generation of systems of functions %J Fundamenta Mathematicae %D 1966 %P 229-240 %V 58 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-58-2-229-240/ %R 10.4064/fm-58-2-229-240 %G en %F 10_4064_fm_58_2_229_240