%0 Journal Article %A V. I. Arnol'd %T Lagrangian Grassmannian of a Quaternion Hypersymplectic Space %J Funkcionalʹnyj analiz i ego priloženiâ %D 2001 %P 74-77 %V 35 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_2001_35_1_a6/ %G ru %F FAA_2001_35_1_a6