TY - JOUR AU - V. G. Kanovei AU - M. Reeken TI - Some new results on Borel irreducibility of equivalence relations JO - Izvestiya. Mathematics PY - 2003 SP - 55 EP - 76 VL - 67 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_2003_67_1_a3/ LA - en ID - IM2_2003_67_1_a3 ER -