Abstract
The blink survey ofUBVR plates of the Tautenburg Schmidt telescope reveals about 20 new stellar associations. A few suspected associations are located at 8 kpc from the center of M33. The new associations fit well into the spiral structure of the galaxy.
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Ivanov, G.R., Georgiev, T.B. & Kunchev, P.Z. The outermost ob associations in M33. Astrophys Space Sci 159, 103–107 (1989). https://doi.org/10.1007/BF00640492
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DOI: https://doi.org/10.1007/BF00640492