Arévalo, P. Cosmology, MPI for Astrophysics, Max Planck Society;
Lira, P., Arévalo, P., Uttley, P., McHardy, I., & Breedt, E. (2011). Optical and near-IR long-term monitoring of NGC 3783 and MR 2251−178: evidence for variable near-IR emission from thin accretion discs. Monthly Notices of the Royal Astronomical Society, 415(2), 1290-1303. doi:10.1111/j.1365-2966.2011.18774.x.