Real time evolution in spin diffusion on magnetic clusterR. Lahreche, R.-J. Tarento, P. Joyes, J. van de Walle and D. E. MekkiEur. Phys. J. D, 24 1-3 (2003) 165-168DOI: https://doi.org/10.1140/epjd/e2003-00143-4