프리드만 방정식 (Korean Wikipedia)

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

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1semanticscholar.org

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arxiv.org (Global: 69^th place; Korean: 54^th place)

Nemiroff, Robert J.; Patla, Bijunath (2008). “Adventures in Friedmann cosmology: A detailed expansion of the cosmological Friedmann equations”. 《American Journal of Physics》 76 (3): 265–276. arXiv:astro-ph/0703739. Bibcode:2008AmJPh..76..265N. doi:10.1119/1.2830536. S2CID 51782808.

bbc.com (Global: 20^th place; Korean: 66^th place)

"China's protests: Blank paper becomes the symbol of rare demonstrations". BBC News. November 28, 2022.

doi.org (Global: 2^nd place; Korean: 3^rd place)

dx.doi.org

Nemiroff, Robert J.; Patla, Bijunath (2008). “Adventures in Friedmann cosmology: A detailed expansion of the cosmological Friedmann equations”. 《American Journal of Physics》 76 (3): 265–276. arXiv:astro-ph/0703739. Bibcode:2008AmJPh..76..265N. doi:10.1119/1.2830536. S2CID 51782808.

harvard.edu (Global: 18^th place; Korean: 27^th place)

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

Nemiroff, Robert J.; Patla, Bijunath (2008). “Adventures in Friedmann cosmology: A detailed expansion of the cosmological Friedmann equations”. 《American Journal of Physics》 76 (3): 265–276. arXiv:astro-ph/0703739. Bibcode:2008AmJPh..76..265N. doi:10.1119/1.2830536. S2CID 51782808.

nasa.gov (Global: 75^th place; Korean: 67^th place)

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 (Global: 11^th place; Korean: 310^th place)

api.semanticscholar.org

Nemiroff, Robert J.; Patla, Bijunath (2008). “Adventures in Friedmann cosmology: A detailed expansion of the cosmological Friedmann equations”. 《American Journal of Physics》 76 (3): 265–276. arXiv:astro-ph/0703739. Bibcode:2008AmJPh..76..265N. doi:10.1119/1.2830536. S2CID 51782808.