Marks, Michael; Kroupa, Pavel (August 2010), “Initial conditions for globular clusters and assembly of the old globular cluster population of the Milky Way”, Monthly Notices of the Royal Astronomical Society406 (3): 2000-2012, arXiv:1004.2255, Bibcode: 2010MNRAS.406.2000M, doi:10.1111/j.1365-2966.2010.16813.x. Mass is from MPD on Table 1.
Marks, Michael; Kroupa, Pavel (August 2010), “Initial conditions for globular clusters and assembly of the old globular cluster population of the Milky Way”, Monthly Notices of the Royal Astronomical Society406 (3): 2000-2012, arXiv:1004.2255, Bibcode: 2010MNRAS.406.2000M, doi:10.1111/j.1365-2966.2010.16813.x. Mass is from MPD on Table 1.
Shapley, Harlow; Sawyer, Helen B. (August 1927), “A Classification of Globular Clusters”, Harvard College Observatory Bulletin (849): 11-14, Bibcode: 1927BHarO.849...11S.
Marks, Michael; Kroupa, Pavel (August 2010), “Initial conditions for globular clusters and assembly of the old globular cluster population of the Milky Way”, Monthly Notices of the Royal Astronomical Society406 (3): 2000-2012, arXiv:1004.2255, Bibcode: 2010MNRAS.406.2000M, doi:10.1111/j.1365-2966.2010.16813.x. Mass is from MPD on Table 1.