%0 Journal Article %A Kośka, Marian %T On some extremum problem in the family of non-decreasing functions %J Acta Universitatis Lodziensis. Folia Mathematica %D 1984 %V 01 %I mathdoc %U http://geodesic.mathdoc.fr/item/AULFM_1984_01_a9/ %G en %F AULFM_1984_01_a9