Functional-integral study of spin fluctuations in small Fe clusters R. Garibay-Alonso, J. Dorantes-Dávila and G. M. Pastor Eur. Phys. J. D, 52 1-3 (2009) 167-170 Published online: 24 January 2009 DOI: 10.1140/epjd/e2008-00243-7