(EN) Patrick L. Kelly et al., Extreme magnification of an individual star at redshift 1.5 by a galaxy-cluster lens (abstract), in Nature Astronomy, 2 aprile 2018, DOI:10.1038/s41550-018-0430-3.
(EN) Patrick L. Kelly et al., Extreme magnification of an individual star at redshift 1.5 by a galaxy-cluster lens (abstract), in Nature Astronomy, 2 aprile 2018, DOI:10.1038/s41550-018-0430-3.