%0 Journal Article %A L. Accardi %A F. M. Mukhamedov %A M. Kh. Saburov %T Uniqueness of Quantum Markov Chains Associated with an $XY$-Model on a Cayley Tree of Order~$2$ %J Matematičeskie zametki %D 2011 %P 168-182 %V 90 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2011_90_2_a1/ %G ru %F MZM_2011_90_2_a1