%0 Journal Article %A L. I. Slepyan %A V. M. Fadeev %T Reflection, refraction and radiation of waves in a piecewise %J Doklady Akademii Nauk %D 1988 %P 325-329 %V 299 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1988_299_2_a15/ %G ru %F DAN_1988_299_2_a15