https://arxiv.org/abs/cond-mat/0406680
[cond-mat/0406680] Thermodynamic properties of a tetramer ferro-ferro-antiferro-antiferromagnetic...
Abstract page for arXiv paper cond-mat/0406680: Thermodynamic properties of a tetramer ferro-ferro-antiferro-antiferromagnetic Ising-Heisenberg bond...
thermodynamic propertiescondmat