%0 Journal Article %A Yu. S. Ilyashenko %T Density of an~individual solution and ergodicity of a~family of solutions to the equation $d\eta/d\xi=P(\xi,\,\eta)/Q(\xi,\,\eta)$ %J Matematičeskie zametki %D 1968 %P 741-750 %V 4 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1968_4_6_a14/ %G ru %F MZM_1968_4_6_a14