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Paust, Nathaniel E. Q.; Reid, I. Neill; Piotto, Giampaolo; et al. (February 2010), "The ACS Survey of Galactic Globular Clusters. VIII. Effects of Environment on Globular Cluster Global Mass Functions", The Astronomical Journal, 139 (2): 476–491, Bibcode:2010AJ....139..476P, doi:10.1088/0004-6256/139/2/476, hdl:2152/34371, S2CID120965440.
Samus, N. N.; Pastukhova, E. N.; Durlevich, O. V.; Kazarovets, E. V.; Kireeva, N. (2020), "The 83rd Name-List of Variable Stars. Variables in Globular Clusters and Novae", Peremennye Zvezdy (Variable Stars) 40, No. 8, 40 (8): 8, Bibcode:2020PZ.....40....8S, doi:10.24411/2221-0474-2020-10009
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