%0 Journal Article %A R. Schäfke %T Inverse Problems in the Theory of Singular Perturbations %J Contemporary Mathematics. Fundamental Directions %D 2003 %P 63-88 %V 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2003_3_a3/ %G ru %F CMFD_2003_3_a3