%0 Journal Article %A V. P. Yashnikov %T The structure of $\mathscr H_s$-optimal solutions of the inverse kinematic problem of diffraction from polycrystalline objects %J Sbornik. Mathematics %D 1984 %P 381-389 %V 48 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1984_48_2_a6/ %G en %F SM_1984_48_2_a6