%0 Journal Article %A K. A. Lurie %A A. V. Cherkaev %T Exact estimates of conductivity of mixtures composed of two materials %J Doklady Akademii Nauk %D 1982 %P 1128-1130 %V 264 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1982_264_5_a27/ %G ru %F DAN_1982_264_5_a27