%0 Journal Article %A Tadeusz Świątkowski %T On the conditions of monotonicity of functions %J Fundamenta Mathematicae %D 1966 %P 189-201 %V 59 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-59-2-189-201/ %R 10.4064/fm-59-2-189-201 %G en %F 10_4064_fm_59_2_189_201