PT - JOURNAL ARTICLE AU - Clery, Daniel TI - Middleweight black holes found at last AID - 10.1126/science.360.6393.1057 DP - 2018 Jun 08 TA - Science PG - 1057--1057 VI - 360 IP - 6393 4099 - http://science.sciencemag.org/content/360/6393/1057.short 4100 - http://science.sciencemag.org/content/360/6393/1057.full SO - Science2018 Jun 08; 360