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프리드만 방정식 (Korean Wikipedia)

Analysis of information sources in references of the Wikipedia article "프리드만 방정식" in Korean language version.

refsWebsite
Global rank Korean rank
3harvard.edu
18th place
27th place
1nasa.gov
75th place
67th place
1arxiv.org
69th place
54th place
1doi.org
2nd place
3rd place
1semanticscholar.org
11th place
310th place
1bbc.com
20th place
66th place

arxiv.org

bbc.com

doi.org

dx.doi.org

harvard.edu

ui.adsabs.harvard.edu

  • Friedman, A (1922). "Über die Krümmung des Raumes". Z. Phys. (in German). 10 (1): 377–386. Bibcode:1922ZPhy...10..377F. (English translation: Friedman, A (1999). "On the Curvature of Space". General Relativity and Gravitation. 31 (12): 1991–2000. Bibcode:1999GReGr..31.1991F. The original Russian manuscript of this paper is preserved in the Ehrenfest archive.
  • Friedmann, A (1924). "Über die Möglichkeit einer Welt mit konstanter negativer Krümmung des Raumes". Z. Phys. (in German). 21 (1): 326–332. Bibcode:1924ZPhy...21..326F. (English translation: Friedmann, A (1999). "On the Possibility of a World with Constant Negative Curvature of Space". General Relativity and Gravitation. 31 (12): 2001–2008. Bibcode:1999GReGr..31.2001F.

adsabs.harvard.edu

nasa.gov

map.gsfc.nasa.gov

  • “Universe 101”. NASA. 2015년 9월 9일에 확인함. The actual density of atoms is equivalent to roughly 1 proton per 4 cubic meters. 

semanticscholar.org

api.semanticscholar.org