%0 Journal Article %A V. V. Balashchenko %A O. V. Dashevich %T Geometry of canonical structures on homogeneous~$\Phi$-spaces of order~4 %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1994 %P 149-150 %V 49 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1994_49_4_a6/ %G en %F RM_1994_49_4_a6