%0 Journal Article %A Babiarz, A. %A Klamka, J. %A Niezabitowski, M. %T Schauder’s fixed-point theorem in approximate controllability problems %J International Journal of Applied Mathematics and Computer Science %D 2016 %P 263-275 %V 26 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJAMCS_2016_26_2_a0/ %G en %F IJAMCS_2016_26_2_a0