Astrophysics: Cosmic lens reveals spinning black hole Astrophysics: Cosmic lens reveals spinning black holeDOI: info:10.1038/nature13209v. 507173–174Risaliti, Guido. 2014. "Astrophysics: Cosmic lens reveals spinning black hole." Nature, 507 173–174. https://doi.org/10.1038/nature13209.More...ID: 120704Type: articleKeywords: SAO