NGC 40 (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 40" in Polish language version.

refsWebsite

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1web.archive.org

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cseligman.com

Courtney Seligman: NGC 40. [w:] Celestial Atlas [on-line]. [dostęp 2014-10-27]. (ang.).

doi.org

Yu.F. Mal’kov. A self-consistent determination of the distances, physical parameters, and chemical composition for a large sample of galactic planetary nebulae: The distances and parameters of central stars and the optical depths of envelopes. „Astronomy Reports”. 41 (6), s. 760–776, 1997. DOI: 10.1086/192173. (ang.).

harvard.edu

chandra.harvard.edu

NGC 40: A planetary nebula about 3,000 light years from Earth. [dostęp 2013-03-24]. (ang.).

ui.adsabs.harvard.edu

Yu.F. Mal’kov. A self-consistent determination of the distances, physical parameters, and chemical composition for a large sample of galactic planetary nebulae: The distances and parameters of central stars and the optical depths of envelopes. „Astronomy Reports”. 41 (6), s. 760–776, 1997. DOI: 10.1086/192173. (ang.).

hekko.pl

astronomia.hekko.pl

NGC 40 – mgławica planetarna w konstelacji Cefeusza. [dostęp 2013-03-24]. [zarchiwizowane z tego adresu (2016-03-04)].

u-strasbg.fr

simbad.u-strasbg.fr

NGC 40 w bazie SIMBAD (ang.)

web.archive.org

NGC 40 – mgławica planetarna w konstelacji Cefeusza. [dostęp 2013-03-24]. [zarchiwizowane z tego adresu (2016-03-04)].