%0 Journal Article %A V. D. Irtegov %A T. N. Titorenko %T On invariant sets for the equations of motion of a rigid body in the Hess--Appelrot case %J The Bulletin of Irkutsk State University. Series Mathematics %D 2020 %P 20-34 %V 33 %I mathdoc %U http://geodesic.mathdoc.fr/item/IIGUM_2020_33_a1/ %G en %F IIGUM_2020_33_a1