Sim, S. A. Stellar Astrophysics, MPI for Astrophysics, Max Planck Society;
Longinotti, A. L., Sim, S. A., Nandra, K., & Cappi, M. (2007). Evidence for relativistic features in the X-ray spectrum of Mrk 335. Monthly Notices of the Royal Astronomical Society, 374(1), 237-247. doi:10.1111/j.1365-2966.2006.11138.x.