%0 Journal Article %T copolymerization of ethyulene / propylene elastomer using high- activity ziegler-natta catalyst syst %A F. Sadeghvandi, R> JAmjah, S. Ahmadjo, M. Nekoomanesh, E. Bigdelli %A Zohuri, Gholamhossein %J Journal of Applied Polymer Science %@ 0021-8995 %D 2002