%0 Journal Article %A M. S. Soppa %T The use of duality relations for $E$- and $H$-polarisations in inverse problems of scattering on impedance surfaces %J Sibirskij žurnal industrialʹnoj matematiki %D 2004 %P 111-116 %V 7 %N 2 %U http://geodesic.mathdoc.fr/item/SJIM_2004_7_2_a10/ %G ru %F SJIM_2004_7_2_a10