Abdo, A. A., Ackermann, M., Ajello, M., Atwood, W. B., Axelsson, M., Baldini, L., et al. (2009). Early Fermi gamma-ray space telescope observations of the quasar 3C 454.3. The Astrophysical Journal, 699(1), 817-823. doi:10.1088/0004-637X/699/1/817.