%0 Journal Article %A B. A. Rozenfel'd %T Geometric interpretation of quasi-simple exceptional Lie groups of classes $E_7$ and $E_8$ %J Doklady Akademii Nauk %D 1973 %P 289-292 %V 211 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1973_211_2_a6/ %G ru %F DAN_1973_211_2_a6