A Investigation of the Heisenberg Model of a Ferromagnet Using Statistical Green's Functions.

Quantum inverse problem and green functions for the Heisenberg ferromagnet

Consitence of the relations between Green's functions and thermodynamic properties in a Heisenberg ferromagnet

Bogolyubov's statistical variational principle and the Green's function method applied to the Heisenberg-Ising model

Paramagnetic susceptibility and correlation functions of a d -dimensional classical Heisenberg ferromagnet via the two-time Green function method

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

The bosonic and Fermionic Green functions in the quantum theory of Heisenberg ferromagnet