On the Lx – L6 μm ratio as a diagnostic for Compton-thick AGNI. Georgantopoulos, E. Rovilos, A. Akylas, A. Comastri, P. Ranalli, C. Vignali, I. Balestra, R. Gilli and N. CappellutiA&A, 534 (2011) A23DOI: https://doi.org/10.1051/0004-6361/201117400
