Density diagnostics of ionized outflows in active galactic nuclei - X-ray and UV absorption lines from metastable levels in Be-like to C-like ionsJunjie Mao, J. S. Kaastra, M. Mehdipour, A. J. J. Raassen, Liyi Gu and J. M. MillerA&A, 607 (2017) A100DOI: https://doi.org/10.1051/0004-6361/201731378
