%0 Journal Article %A V. S. Matveev %T An example of a geodesic flow on the Klein bottle, integrable by a polynomial in the momentum of the fourth degree %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1997 %P 47-48 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_1997_4_a13/ %G ru %F VMUMM_1997_4_a13