TY - JOUR AU - A. S. Holevo TI - Complementary channels and the additivity problem JO - Teoriâ veroâtnostej i ee primeneniâ PY - 2006 SP - 133 EP - 143 VL - 51 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TVP_2006_51_1_a9/ LA - ru ID - TVP_2006_51_1_a9 ER -