%0 Journal Article %A S. N. Martynov %T Anharmonic states of the one-dimensional anisotropic Heisenberg model with free boundary conditions %J Teoretičeskaâ i matematičeskaâ fizika %D 1998 %P 489-497 %V 117 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1998_117_3_a11/ %G ru %F TMF_1998_117_3_a11