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Magrini, Laura; Stanghellini, Letizia; Villaver, Eva. The Planetary Nebula Population of M33 and its Metallicity Gradient: A Look Into the Galaxy's Distant Past. The Astrophysical Journal. May 2009, 696 (1): 729–740. Bibcode:2009ApJ...696..729M. arXiv:0901.2273. doi:10.1088/0004-637X/696/1/729.
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McConnachie, A. W.; Irwin, M. J.; Ferguson, A. M. N.; Ibata, R. A.; et al. Determining the location of the tip of the red giant branch in old stellar populations: M33, Andromeda I and II. Monthly Notices of the Royal Astronomical Society. May 2004, 350 (1): 250. Bibcode:2004MNRAS.350..243M. arXiv:astro-ph/0401453. doi:10.1111/j.1365-2966.2004.07637.x.
Keel, William C.; Holberg, Jay B.; Treuthardt, Patrick M. Far-Ultraviolet Spectroscopy of Star-forming Regions in Nearby Galaxies: Stellar Populations and Abundance Indicators. The Astronomical Journal. July 2004, 128 (1): 211–223. Bibcode:2004AJ....128..211K. arXiv:astro-ph/0403499. doi:10.1086/421367.
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Abubekerov, M. K.; Antokhina, E. A.; Bogomazov, A. I.; Cherepashchuk, A. M. The mass of the black hole in the X-ray binary M33 X-7 and the evolutionary status of M33 X-7 and IC 10 X-1. Astronomy Reports. March 2009, 53 (3): 232–242. Bibcode:2009ARep...53..232A. arXiv:0906.3429. doi:10.1134/S1063772909030056.
van der Marel, Roeland P.; et al. First Gaia Dynamics of the Andromeda System: DR2 Proper Motions, Orbits, and Rotation of M31 and M33. The Astrophysical Journal. 2019-02-07, 872 (1): 24. arXiv:1805.04079. doi:10.3847/1538-4357/ab001b.
Bonanos, A. Z.; Stanek, K. Z.; Kudritzki; Macri; et al. The First DIRECT Distance to a Detached Eclipsing Binary in M33. Astrophysics and Space Science. 2006, 304 (1–4): 207–209. Bibcode:2006Ap&SS.304..207B. doi:10.1007/s10509-006-9112-1.
Magrini, Laura; Stanghellini, Letizia; Villaver, Eva. The Planetary Nebula Population of M33 and its Metallicity Gradient: A Look Into the Galaxy's Distant Past. The Astrophysical Journal. May 2009, 696 (1): 729–740. Bibcode:2009ApJ...696..729M. arXiv:0901.2273. doi:10.1088/0004-637X/696/1/729.
Karachentsev, I. D.; Kashibadze, O. G. Masses of the local group and of the M81 group estimated from distortions in the local velocity field. Astrophysics. 2006, 49 (1): 3–18. Bibcode:2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6.
McConnachie, A. W.; Irwin, M. J.; Ferguson, A. M. N.; Ibata, R. A.; et al. Determining the location of the tip of the red giant branch in old stellar populations: M33, Andromeda I and II. Monthly Notices of the Royal Astronomical Society. May 2004, 350 (1): 250. Bibcode:2004MNRAS.350..243M. arXiv:astro-ph/0401453. doi:10.1111/j.1365-2966.2004.07637.x.
Zloczewski, K.; Kaluzny, J.; Hartman, J. Photometric Survey for Stellar Clusters in the Outer Part of M33. Acta Astronomica. March 2008, 58: 23–39. Bibcode:2008AcA....58...23Z. arXiv:0805.4230.
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Keel, William C.; Holberg, Jay B.; Treuthardt, Patrick M. Far-Ultraviolet Spectroscopy of Star-forming Regions in Nearby Galaxies: Stellar Populations and Abundance Indicators. The Astronomical Journal. July 2004, 128 (1): 211–223. Bibcode:2004AJ....128..211K. arXiv:astro-ph/0403499. doi:10.1086/421367.
Tammann, G. A.; Loeffler, W.; Schroeder, A. The Galactic supernova rate. The Astrophysical Journal Supplement Series. June 1994, 92 (2): 487–493. Bibcode:1994ApJS...92..487T. doi:10.1086/192002.
Plucinsky, Paul P.; Williams, Benjamin; Long; Gaetz; et al. Chandra ACIS Survey of M33 (ChASeM33): A First Look. The Astrophysical Journal Supplement Series. February 2008, 174 (2): 366–378. Bibcode:2008ApJS..174..366P. arXiv:0709.4211. doi:10.1086/522942.
Grebel, E. K. The Star Formation History of the Local Group. F. Favata; A. Kaas; A. Wilson (编). Proceedings of the 33rd ESLAB symposium on star formation from the small to the large scale. Noordwijk, The Netherlands. November 2–5, 1999. Bibcode:2000ESASP.445...87G. arXiv:astro-ph/0005296.
Abubekerov, M. K.; Antokhina, E. A.; Bogomazov, A. I.; Cherepashchuk, A. M. The mass of the black hole in the X-ray binary M33 X-7 and the evolutionary status of M33 X-7 and IC 10 X-1. Astronomy Reports. March 2009, 53 (3): 232–242. Bibcode:2009ARep...53..232A. arXiv:0906.3429. doi:10.1134/S1063772909030056.