1.
A periodicity of ∼1 hour in X-ray emission from the active galaxy RE J1034+396
by Gierli ski, Marek
Nature (London), 2008-09-18, Vol.455 (7211), p.369-371

2.
A periodicity of approximately 1 hour in X-ray emission from the active galaxy RE J1034+396
by Gierliński, Marek
Nature (London), 2008-09-18, Vol.455 (7211), p.369-371
