TY - JOUR AU - O. E. Orel TI - Investigation of a~neighborhood of a~degenerate one-dimensional orbit of the Poisson action of $\mathbb R^2$ in $M^4$ JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1994 SP - 113 EP - 130 VL - 205 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1994_205_a9/ LA - ru ID - TM_1994_205_a9 ER -