%0 Journal Article %A Yu. V. Bolotin %A S. N. Morgunova %T On the observability of mechanical systems based on angular measurements %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2000 %P 34-38 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2000_4_a7/ %G ru %F VMUMM_2000_4_a7