%0 Journal Article %A Henry R. Busby %T Estimation of state variables from measurements %J Theoretical and applied mechanics %D 1991 %P 37 %V 17 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TAM_1991_17_1_a4/ %G en %F TAM_1991_17_1_a4