TY CONF TI Optical spectroscopy of host-galaxies of intermediate mass black holes: evolution of central black holes KW cosmology: observations; early universe; galaxies: active KW nuclei KW Seyfert; quasars: supermassive black holes JO Modern astronomy: from the Early Universe to exoplanets and black holes AU Goradzhanov, V.. AU Chilingarian, I.. AU Demianenko, M.. AU Katkov, I.. AU Grishin, K.. AU Toptun, V.. AU Rubtsov, E.. AU Gasymov, D.. AU Kuzmin, I.. PY 2024 PB Special Astrophysical Observatory of the Russian Academy of Sciences