Optical properties of small silver clusters supported at MgO V. Bonačić-Koutecký, C. Bürgel, L. Kronik, A. E. Kuznetsov and R. Mitrić Eur. Phys. J. D, 45 3 (2007) 471-476 Published online: 23 May 2007 DOI: 10.1140/epjd/e2007-00166-9