TY - JOUR AU - L. M. Libkind TI - A~problem in the theory of arrangement JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1969 VL - 24 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1969_24_4_a17/ LA - ru ID - RM_1969_24_4_a17 ER -