TY - JOUR AU - V. P. Kostov AU - B. Z. Shapiro TI - The flags in $\mathbf{R}^3$, transversal to a given set of flags, form an $M$-manifold JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 1989 SP - 26 EP - 30 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_1989_5_a6/ LA - ru ID - VMUMM_1989_5_a6 ER -