Ringnebulosan (Swedish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Ringnebulosan" in Swedish language version.

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1kb.se

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1solarsystemquick.com

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1iflscience.com

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iflscience.com

Carpineti, Alfredo (25 april 2017). ”The Discoverer Of The Ring Nebula Has Finally Been Confirmed | IFLScience” (på engelska). IFLSciences webbplats. IFLScience. http://www.iflscience.com/space/the-discoverer-of-the-ring-nebula-has-finally-been-confirmed/. Läst 24 juni 2017.

kb.se

libris.kb.se

Ahlin, Per; Stenholm Björn, Sundman Anita (2005). ”Ringnebulosan”. Astronomisk uppslagsbok. fackgranskning Gunnar Welin. Stockholm: Prisma. sid. 209-210. Libris 9492555. ISBN 91-518-3159-7

solarsystemquick.com

”Ring Nebula - Facts About The Ring Nebula Solarsystemquick” (på engelska). SolarSystemQuicks webbplats. SolarSystemQuick. http://www.solarsystemquick.com/universe/ring-nebula.htm. Läst 24 juni 2017.

u-strasbg.fr

simbad.u-strasbg.fr

”Basic data: M 57 -- Planetary Nebula”. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Messier+57&submit=SIMBAD+search. Läst 1 september 2014.