Structure and magnetism on iron oxide clusters FenOm(n = 1-5): Calculation from first principlesH. Shiroishi, T. Oda, I. Hamada and N. FujimaEur. Phys. J. D, 24 1-3 (2003) 85-88DOI: https://doi.org/10.1140/epjd/e2003-00136-3