Ferraro, Francesco R.; Sills, Alison; Rood, Robert T.; Paltrinieri, Barbara; Buonanno, Roberto (May 2003), ”Blue Straggler Stars: A Direct Comparison of Star Counts and Population Ratios in Six Galactic Globular Clusters”, The Astrophysical Journal 588 (1): 464–477, doi:10.1086/374042, Bibcode: 2003ApJ...588..464F.
Haynes, Sharina; Burks, Geoffrey; Johnson, Christian I.; Pilachowski, Catherine A. (October 2008), ”Chemical Analysis of Five Red Giants in the Globular Cluster M10 (NGC 6254)”, The Publications of the Astronomical Society of the Pacific 120 (872): 1097–1102, doi:10.1086/592717, Bibcode: 2008PASP..120.1097H.
Ferraro, Francesco R.; Sills, Alison; Rood, Robert T.; Paltrinieri, Barbara; Buonanno, Roberto (May 2003), ”Blue Straggler Stars: A Direct Comparison of Star Counts and Population Ratios in Six Galactic Globular Clusters”, The Astrophysical Journal 588 (1): 464–477, doi:10.1086/374042, Bibcode: 2003ApJ...588..464F.
Haynes, Sharina; Burks, Geoffrey; Johnson, Christian I.; Pilachowski, Catherine A. (October 2008), ”Chemical Analysis of Five Red Giants in the Globular Cluster M10 (NGC 6254)”, The Publications of the Astronomical Society of the Pacific 120 (872): 1097–1102, doi:10.1086/592717, Bibcode: 2008PASP..120.1097H.