%0 Journal Article %A S. Rolewicz %T On universal time for the controllability of time-depending linear control systems %J Studia Mathematica %D 1976 %P 133 %V 59 %N 2 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/STUMA_1976__59_2_218088/ %G en %F STUMA_1976__59_2_218088