1 D.C. Fox, J.L. Linsky, A.W. Veale, R.C. Dempsey, A.. Brown, L.. Nava, I.. Pagano, M.. Rodono, G.E. Bromage, M.. Kürster, and J.H.M.M. Schmitt, Astronomy and Astrophysics 284, (1994).
1 D.. Burlon, G.. Ghirlanda, G.. Ghisellini, D.. Lazzati, L.. Nava, M.. Nardini, and A.. Celotti, The Astrophysical Journal 685, (2008).
1 M.C. Begelman, B.C. Morsony, C.. Firmani, D.. Lazzati, G.. Ghirlanda, G.. Ghisellini, and L.. Nava, in AIP (AIP, Washington, D.C. (USA), 2006), pp. 513–521.
1 G.. Ghirlanda, G.. Ghisellini, C.. Firmani, L.. Nava, F.. Tavecchio, and D.. Lazzati, Astronomy and Astrophysics 452, (2006).