TY - JOUR AU - Yu. S. Semenov TI - Proof of a generalization of the conjecture of Hanna Neumann for virtually free groups JO - Sbornik. Mathematics PY - 1996 SP - 1561 EP - 1575 VL - 187 IS - 10 UR - http://geodesic.mathdoc.fr/item/SM_1996_187_10_a7/ LA - en ID - SM_1996_187_10_a7 ER -