%0 Journal Article %A Zh. P. Kachanova %A V. V. Voevodskii %A A. P. Purmal' %T The electric conductivity of the $\mathrm{MnO}_2$ semiconductor in the course of oxidation by $\mathrm{CO}$ %J Doklady Akademii Nauk %D 1960 %P 648-650 %V 135 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_135_3_a36/ %G ru %F DAN_1960_135_3_a36