%0 Journal Article %A F. H. Haydarov %T Characterization of the normal subgroups of finite index for the group representation of a Cayley tree %J Nanosistemy: fizika, himiâ, matematika %D 2016 %P 888-892 %V 7 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/NANO_2016_7_5_a10/ %G en %F NANO_2016_7_5_a10