Nandra, K. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Vaughan, S., Uttley, P., Pounds, K. A., Nandra, K., & Strohmayer, T. E. (2011). The rapid X-ray variability of NGC 4051. Monthly Notices of the Royal Astronomical Society, 413(4), 2489-2499. doi:10.1111/j.1365-2966.2011.18319.x.