%0 Journal Article %A V. V. Vlasov %T Multiple minimality of a part of a system of root vectors of some %J Doklady Akademii Nauk %D 1990 %P 276-280 %V 310 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1990_310_2_a3/ %G ru %F DAN_1990_310_2_a3