%0 Journal Article %A G. L. Rcheulishvili %A M. V. Saveliev %T Multidimensional nonlinear systems related to the Grassman manifolds $BI$, $DI$ %J Funkcionalʹnyj analiz i ego priloženiâ %D 1987 %P 83-84 %V 21 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1987_21_4_a14/ %G ru %F FAA_1987_21_4_a14