%0 Journal Article %A M. A. Dalin %A I. I. Pis'man %A A. A. Bakhshi-Zade %A A. A. Buniyat-Zade %T Copolymerization of ethylene with propylene and $\alpha$-butylene on chromium oxide catalyst %J Doklady Akademii Nauk %D 1960 %P 1084-1085 %V 133 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_133_5_a24/ %G ru %F DAN_1960_133_5_a24