DFT studies of the molecular nanomagnet Fe8 and the V15 spin system - Electronic structure and magnetic orderingJ. Kortus, M. R. Pederson, C. S. Hellberg and S. N. KhannaEur. Phys. J. D, 16 1-3 (2001) 177-180DOI: https://doi.org/10.1007/s100530170086