Quasars as standard candles
Bartolomeo Trefoloni(Arcetri Astrophysical Observatory), Matilde Signorini(Istituto Nazionale di Fisica Nucleare, Sezione di Firenze), Giada Bargiacchi(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati), P. Pietrini(University of Florence), A. Marconi(Arcetri Astrophysical Observatory), Elisabeta Lusso(Arcetri Astrophysical Observatory), G. Risaliti(Center for Astrophysics Harvard & Smithsonian), E. Nardini(Arcetri Astrophysical Observatory), Andrea Sacchi(University of Florence)
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