Methods Published on 23 Jan 2020 Extreme Quasars as Distance Indicators in Cosmology in Extragalactic Astronomy Deborah DultzinPaola MarzianiJ. A. de DiegoC. A. NegreteAscensión Del OlmoMary L. Martínez-AldamaMauro D'OnofrioEdi BonNatasa BonGiovanna M. Stirpe Frontiers in Astronomy and Space Sciences doi 10.3389/fspas.2019.00080 5,531 views 25 citations