The HELLAS2XMM Survey. VII. The Hard X‐Ray Luminosity Function of AGNs up toz= 4: More Absorbed AGNs at Low Luminosities and High Redshifts
scientific article published in the Astrophysical Journal
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author: Fabio La Franca, Fabrizio Fiore, Andrea Comastri, Marcella Brusa, Chiara Feruglio, Paolo Ciliegi, Alessandra Lamastra, Roberto Maiolino, Marco Mignoli, Silvano Molendi, Simonetta Puccetti, Giuseppe Perola, Giorgio Matt
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