Evaluation of effective electromagnetic properties in heterogeneous media O. Bottauscio, V. Chiadò Piat, M. Chiampi, M. Codegone and A. Manzin Eur. Phys. J. Appl. Phys., 39 2 (2007) 113-118 Published online: 10 May 2007 DOI: 10.1051/epjap:2007070