Mechanism of ground-state selection in the frustrated molecular spin cluster G. Chaboussant, S. T. Ochsenbein, A. Sieber, H.-U. Güdel, H. Mutka, A. Müller and B. BarbaraEurophys. Lett., 66 3 (2004) 423-429DOI: https://doi.org/10.1209/epl/i2004-10008-x