NGC 3640 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 3640" in English language version.

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archive.today

arxiv.org

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caltech.edu

ned.ipac.caltech.edu

  • "NASA/IPAC Extragalactic Database". Results for NGC 3640. Retrieved 2016-01-18.

cseligman.com

  • Seligman, Courtney. "NGC 3640". Celestial Atlas. Retrieved 19 November 2018.

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harvard.edu

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worldcat.org

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  • Prugniel, P.; Nieto, J.L.; Bender, R.; Davoust, E. (October 1988). "The 'normal' elliptical galaxy NGC 3640 - A merger in progress?". Astronomy and Astrophysics. 204 (1–2): 61–67. Bibcode:1988A&A...204...61P. ISSN 0004-6361.