%0 Journal Article %A O. E. Orel %T Investigation of a~neighborhood of a~degenerate one-dimensional orbit of the Poisson action of $\mathbb R^2$ in $M^4$ %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1994 %P 113-130 %V 205 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1994_205_a9/ %G ru %F TM_1994_205_a9