TY - JOUR AU - V. N. Kolokoltsov TI - Geodesic flows on two-dimensional manifolds with an additional first integral that is polynomial in the velocities JO - Izvestiya. Mathematics PY - 1983 SP - 291 EP - 306 VL - 21 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_1983_21_2_a4/ LA - en ID - IM2_1983_21_2_a4 ER -