Reipurth, B. (2008). "Young Stars in NGC 6231 and the Sco OB1 Association". In Reipurth, B. (ed.). Handbook of Star Forming Regions, Volume II: The Southern Sky ASP Monograph Publications. Vol. 5. Astronomical Society of the Pacific. p. 401. Bibcode:2008hsf2.book..401R. ISBN978-1-58381-670-7.