The anisotropic quantum antiferromagnet on the Sierpiński gasket: Ground state and thermodynamicsA. Voigt, W. Wenzel, J. Richter and P. TomczakEur. Phys. J. B, 38 1 (2004) 49-58DOI: https://doi.org/10.1140/epjb/e2004-00098-8