%0 Journal Article %A Kurina, G. K. %T Optimal feedback control proportional to the system state can be found for non-causal descriptor systems (a remark on a paper by P. C. Müller) %J International Journal of Applied Mathematics and Computer Science %D 2002 %P 591-593 %V 12 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJAMCS_2002_12_4_a13/ %G en %F IJAMCS_2002_12_4_a13