References analysis of the Wikipedia article "Messier 2" in the English version

adsabs.harvard.edu (Global: 14^th place; English: 9^th place)

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Shapley, Harlow; Sawyer, Helen B. (August 1927). "A Classification of Globular Clusters". Harvard College Observatory Bulletin. 849 (849): 11–14. Bibcode:1927BHarO.849...11S.

Goldsbury, Ryan; et al. (December 2010). "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters". The Astronomical Journal. 140 (6): 1830–1837. arXiv:1008.2755. Bibcode:2010AJ....140.1830G. doi:10.1088/0004-6256/140/6/1830. S2CID 119183070.

Baumgardt, H.; Vasiliev, E. (2021). "Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST, and literature data". Monthly Notices of the Royal Astronomical Society. 505 (4): 5957. arXiv:2105.09526. Bibcode:2021MNRAS.505.5957B. doi:10.1093/mnras/stab1474.

Boyles, J.; et al. (November 2011). "Young Radio Pulsars in Galactic Globular Clusters". The Astrophysical Journal. 742 (1): 51. arXiv:1108.4402. Bibcode:2011ApJ...742...51B. doi:10.1088/0004-637X/742/1/51. S2CID 118649860.

Marín-Franch, Antonio; Aparicio, Antonio; Piotto, Giampaolo; Rosenberg, Alfred; Chaboyer, Brian; Sarajedini, Ata; Siegel, Michael; Anderson, Jay; Bedin, Luigi R.; Dotter, Aaron; Hempel, Maren; King, Ivan; Majewski, Steven; Milone, Antonino P.; Paust, Nathaniel; Reid, I. Neill (2009). "The ACS Survey of Galactic Globular Clusters. VII. Relative Ages". The Astrophysical Journal. 694 (2): 1498. arXiv:0812.4541. Bibcode:2009ApJ...694.1498M. doi:10.1088/0004-637X/694/2/1498. S2CID 118407466.

Cudworth, Kyle M.; Rauscher, Bernard J. (1987). "Astrometry and Photometry in the Globular Cluster System M2". The Astronomical Journal. 93: 856. Bibcode:1987AJ.....93..856C. doi:10.1086/114369.

Myeong, G. C; Evans, N. W; Belokurov, V; Sanders, J. L; Koposov, S. E (2018). "The Sausage Globular Clusters". The Astrophysical Journal. 863 (2): L28. arXiv:1805.00453. Bibcode:2018ApJ...863L..28M. doi:10.3847/2041-8213/aad7f7. S2CID 67791285.

Grillmair, Carl J. (2022). "The Extended Tidal Tails of NGC 7089 (M2)". The Astrophysical Journal. 929 (1): 89. arXiv:2203.04425. Bibcode:2022ApJ...929...89G. doi:10.3847/1538-4357/ac5bd7. S2CID 247318732.

van den Bergh, Sidney (2011). "Some Systematics of Galactic Globular Clusters". Publications of the Astronomical Society of the Pacific. 123 (907): 1044–1053. arXiv:1108.0708. Bibcode:2011PASP..123.1044V. doi:10.1086/662132. ISSN 0004-6280.

Stobie, R. S. (1971). "On the Difference Between the Oosterhoff Types i and II Globular Clusters". The Astrophysical Journal. 168: 381. Bibcode:1971ApJ...168..381S. doi:10.1086/151094.

Botev, Svetoslav; Petrov, Georgi; Valcheva, Antoniya; Nedialkov, Petko (2025-07-01). "Structural parameters of the globular cluster M 2 determined by ellipse fitting of its stellar density". Physica Scripta. 100 (7): 075005. Bibcode:2025PhyS..100g5005B. doi:10.1088/1402-4896/add843. ISSN 0031-8949.

arxiv.org (Global: 49^th place; English: 31^st place)

Kuehn, Charles A.; Smith, Horace A.; Catelan, Marcio; Jeon, Young-Beom; Nemec, James M.; Walker, Alistair R.; Kunder, Andrea; Dame, Kyra; Pritzl, Barton J.; De Lee, Nathan; Borissova, Jura (2013-10-01). "RR Lyrae in the LMC: Insights Into the Oosterhoff Phenomenon". arXiv:1310.0553 [astro-ph.SR].

doi.org (Global: 2^nd place; English: 2^nd place)

Cudworth, Kyle M.; Rauscher, Bernard J. (1987). "Astrometry and Photometry in the Globular Cluster System M2". The Astronomical Journal. 93: 856. Bibcode:1987AJ.....93..856C. doi:10.1086/114369.

Stobie, R. S. (1971). "On the Difference Between the Oosterhoff Types i and II Globular Clusters". The Astrophysical Journal. 168: 381. Bibcode:1971ApJ...168..381S. doi:10.1086/151094.

semanticscholar.org (Global: 15^th place; English: 8^th place)

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Messier 2 (English Wikipedia)

adsabs.harvard.edu (Global: 14^th place; English: 9^th place)

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arxiv.org (Global: 49^th place; English: 31^st place)

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books.google.com (Global: 3^rd place; English: 3^rd place)

doi.org (Global: 2^nd place; English: 2^nd place)

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messier.seds.org

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u-strasbg.fr (Global: 163^rd place; English: 833^rd place)

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worldcat.org (Global: 4^th place; English: 4^th place)

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Messier 2 (English Wikipedia)

adsabs.harvard.edu (Global: 14th place; English: 9th place)

ui.adsabs.harvard.edu

arxiv.org (Global: 49th place; English: 31st place)

astronomy.com (Global: 8,265th place; English: 6,952nd place)

cs.astronomy.com

books.google.com (Global: 3rd place; English: 3rd place)

doi.org (Global: 2nd place; English: 2nd place)

messier-objects.com (Global: low place; English: low place)

noirlab.edu (Global: low place; English: low place)

seds.org (Global: 942nd place; English: 5,625th place)

messier.seds.org

semanticscholar.org (Global: 15th place; English: 8th place)

api.semanticscholar.org

u-strasbg.fr (Global: 163rd place; English: 833rd place)

simbad.u-strasbg.fr

worldcat.org (Global: 4th place; English: 4th place)

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adsabs.harvard.edu (Global: 14^th place; English: 9^th place)

arxiv.org (Global: 49^th place; English: 31^st place)

astronomy.com (Global: 8,265^th place; English: 6,952^nd place)

books.google.com (Global: 3^rd place; English: 3^rd place)

doi.org (Global: 2^nd place; English: 2^nd place)

seds.org (Global: 942^nd place; English: 5,625^th place)

semanticscholar.org (Global: 15^th place; English: 8^th place)

u-strasbg.fr (Global: 163^rd place; English: 833^rd place)

worldcat.org (Global: 4^th place; English: 4^th place)