AUTHOR=Danehkar A. TITLE=Relativistic reflection modeling in AGN and related variability from PCA: a brief review JOURNAL=Frontiers in Astronomy and Space Sciences VOLUME=11 YEAR=2024 URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2024.1479301 DOI=10.3389/fspas.2024.1479301 ISSN=2296-987X