%0 Journal Article %A Beneš, Karel %T Solution of a given problem in the back time %J Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica %D 1976 %P 59-62 %V 15 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AUPO_1976__15_1_a5/ %G en %F AUPO_1976__15_1_a5