%0 Journal Article %A Urszula Ledzewicz %A Mohammad Naghnaeian %A Heinz Schättler %T An optimal control approach to cancer treatment under immunological activity %J Applicationes Mathematicae %D 2011 %P 17-31 %V 38 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am38-1-2/ %R 10.4064/am38-1-2 %G en %F 10_4064_am38_1_2