Real space renormalization group with effective interactions: applications to 2-D spin latticesM. Al Hajj, N. Guihéry, J.-P. Malrieu and B. BocquillonEur. Phys. J. B, 41 1 (2004) 11-21DOI: https://doi.org/10.1140/epjb/e2004-00288-4