%0 Journal Article %A A. I. Konovalov %T Steric hindrances in the dienesynthesis of cyclopentadiene with dienophiles of the isopropenyl type %J Doklady Akademii Nauk %D 1963 %P 1334-1336 %V 149 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1963_149_6_a24/ %G ru %F DAN_1963_149_6_a24