%0 Journal Article %A D. V. Novikov %T Topological features of the Sokolov integrable case on the Lie algebra $\mathrm{so}(3,1)$ %J Sbornik. Mathematics %D 2014 %P 1107-1132 %V 205 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2014_205_8_a2/ %G en %F SM_2014_205_8_a2