%0 Journal Article %A T. A. Tagi-zade %T The simplest problem of stationary diffraction by an ideally conducting absolutely rigid wedge that is ``frozen''' in a piezoelectric ceramic space %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1993 %P 92-96 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_1993_3_a19/ %G ru %F VMUMM_1993_3_a19