%0 Journal Article %A Walczak, Stanislaw %T On some control problem %J Acta Universitatis Lodziensis. Folia Mathematica %D 1984 %V 01 %I mathdoc %U http://geodesic.mathdoc.fr/item/AULFM_1984_01_a3/ %G en %F AULFM_1984_01_a3