Messier 109 (Norwegian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Messier 109" in Norwegian language version.

refsWebsite

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archive.org

Kaufmann, D.E.; Contopoulos, G. (1996). «Self-consistent models of barred spiral galaxies». Astronomy & Astrophysics. 309: 381–402. Bibcode:1996A&A...309..381K.

caltech.edu

nedipac.caltech.edu

«NASA/IPAC Extragalactic Database». Results for M 109. Besøkt 10. oktober 2006.
Den er også det klart fjerneste objektet i Messierkatalogen, etterfulgt av M91. «Distance Results for MESSIER 109». NASA/IPAC Extragalactic Database. Besøkt 2. mai 2010.

harvard.edu

adsabs.harvard.edu

Kaufmann, D.E.; Contopoulos, G. (1996). «Self-consistent models of barred spiral galaxies». Astronomy & Astrophysics. 309: 381–402. Bibcode:1996A&A...309..381K.