One-particle green s function in the anisotropic Heisenberg model

Single-particle Green's function in an anisotropic Heisenberg model

Single-particle Green's function in the anisotropic Heisenberg model II. Allowance for higher correlation functions

Green functions of the anisotropic Heisenberg model

One self-consistent closure for chains of equations for Green's functions. An anisotropic heisenberg model

On the paper “single-particle Green's function in the anisotropic heisenberg model II. Allowance for higher correlation functions”

Exact set of equations for the Green's functions in the Heisenberg model