Searching for signatures of Fe II atomic processes in spectra of active galactic nuclei Jelena Kovačević-Dojčinović, Ivan Dojčinović, Maša Lakićević and Luka Č. Popović A&A, 694 (2025) A289 Published online: 25 February 2025 DOI: 10.1051/0004-6361/202450516