Kvasar (Estonian Wikipedia)

"Arhiivikoopia" (PDF). Originaali (PDF) arhiivikoopia seisuga 17. detsember 2008. Vaadatud 8. novembril 2011.{{netiviide}}: CS1 hooldus: arhiivikoopia kasutusel pealkirjana (link)

hubblesite.org (Global: 6,472^nd place; Estonian: 2,162^nd place)

Hubble Surveys the "Homes" of Quasars Hubblesite News Archive, 1996-35
"Hubble Surveys the "Homes" of Quasars". HubbleSite. 19. november 1996. Vaadatud 1.07.2011.
"Hubble Uncovers a Hidden Quasar in a Nearby Galaxy (Cygnus A)". HubbleSite. 21. september 1994. Vaadatud 1.07.2011.

jstor.org (Global: 23^rd place; Estonian: 100^th place)

http://www.jstor.org/pss/3971408

kb.dk (Global: 8,422^nd place; Estonian: 5,776^th place)

adsabs.harvard.edu.ep.fjernadgang.kb.dk

"Peter J. Barthel, Is every Quasar beamed?, The Astrophysical Journal, 336:606–611, 1989". Adsabs.harvard.edu.ep.fjernadgang.kb.dk. Vaadatud 1.07.2011.

man.ac.uk (Global: low place; Estonian: low place)

jb.man.ac.uk

"The MKI and the discovery of Quasars". Jodrell Bank Observatory. Vaadatud 23.11.2006.

nasa.gov (Global: 12^th place; Estonian: 47^th place)

nasa.gov

"NASA Goddard Space Flight Center: News of light that may be from population III stars". Nasa.gov. Originaali arhiivikoopia seisuga 16.04.2011. Vaadatud 1.07.2011.

science.nasa.gov

Dooling D. "BATSE finds most distant quasar yet seen in soft gamma rays Discovery will provide insight on formation of galaxies". Originaali arhiivikoopia seisuga 23. juuli 2009. Vaadatud 9. novembril 2011.

spacetelescope.org (Global: 1,118^th place; Estonian: 2,785^th place)

"http://www.spacetelescope.org/images/heic1116a/". ESA/Hubble Press Release. Originaali arhiivikoopia seisuga 7. november 2011. Vaadatud 4. novembril 2011. {{cite news}}: välislink kohas |title= (juhend)

ua.edu (Global: 6,314^th place; Estonian: 2,337^th place)

astr.ua.edu

Keel, William C. (oktoober 2009). "Alternate Approaches and the Redshift Controversy". The University of Alabama. Vaadatud 27.09.2010.
"Active Galaxies and Quasars – Double Quasar 0957+561". Astr.ua.edu. Vaadatud 1.07.2011.

web.archive.org (Global: 1^st place; Estonian: 1^st place)

"7. HIGH-ENERGY ASTROPHYSICS ELECTROMAGNETIC RADIATION". Neutrino.aquaphoenix.com. Originaali arhiivikoopia seisuga 7.07.2011. Vaadatud 1.07.2011.
"Arhiivikoopia" (PDF). Originaali (PDF) arhiivikoopia seisuga 17. detsember 2008. Vaadatud 8. novembril 2011.{{netiviide}}: CS1 hooldus: arhiivikoopia kasutusel pealkirjana (link)
"http://www.spacetelescope.org/images/heic1116a/". ESA/Hubble Press Release. Originaali arhiivikoopia seisuga 7. november 2011. Vaadatud 4. novembril 2011. {{cite news}}: välislink kohas |title= (juhend)
"NASA Goddard Space Flight Center: News of light that may be from population III stars". Nasa.gov. Originaali arhiivikoopia seisuga 16.04.2011. Vaadatud 1.07.2011.
Dooling D. "BATSE finds most distant quasar yet seen in soft gamma rays Discovery will provide insight on formation of galaxies". Originaali arhiivikoopia seisuga 23. juuli 2009. Vaadatud 9. novembril 2011.

worldcat.org (Global: 4^th place; Estonian: 18^th place)

Schmidt Maarten (1963). "3C 273: a star-like object with large red-shift". Nature. 197 (4872): 1040–1040. Bibcode:1963Natur.197.1040S. DOI:10.1038/1971040a0. ISSN 0028-0836.

Kvasar (Estonian Wikipedia)

adsabs.harvard.edu (Global: 14th place; Estonian: 71st place)

ui.adsabs.harvard.edu

aquaphoenix.com (Global: low place; Estonian: low place)

neutrino.aquaphoenix.com

archive.org (Global: 6th place; Estonian: 17th place)

cfa.harvard.edu (Global: 2,284th place; Estonian: 3,117th place)

chandra.harvard.edu (Global: low place; Estonian: 8,571st place)

doi.org (Global: 2nd place; Estonian: 8th place)

eso.org (Global: 2,825th place; Estonian: 807th place)

galaxydynamics.org (Global: low place; Estonian: low place)

hubblesite.org (Global: 6,472nd place; Estonian: 2,162nd place)

jstor.org (Global: 23rd place; Estonian: 100th place)

kb.dk (Global: 8,422nd place; Estonian: 5,776th place)

adsabs.harvard.edu.ep.fjernadgang.kb.dk

man.ac.uk (Global: low place; Estonian: low place)

jb.man.ac.uk

nasa.gov (Global: 12th place; Estonian: 47th place)

nasa.gov

science.nasa.gov

spacetelescope.org (Global: 1,118th place; Estonian: 2,785th place)

ua.edu (Global: 6,314th place; Estonian: 2,337th place)

astr.ua.edu

web.archive.org (Global: 1st place; Estonian: 1st place)

worldcat.org (Global: 4th place; Estonian: 18th place)

adsabs.harvard.edu (Global: 14^th place; Estonian: 71^st place)

archive.org (Global: 6^th place; Estonian: 17^th place)

cfa.harvard.edu (Global: 2,284^th place; Estonian: 3,117^th place)

chandra.harvard.edu (Global: low place; Estonian: 8,571^st place)

doi.org (Global: 2^nd place; Estonian: 8^th place)

eso.org (Global: 2,825^th place; Estonian: 807^th place)

hubblesite.org (Global: 6,472^nd place; Estonian: 2,162^nd place)

jstor.org (Global: 23^rd place; Estonian: 100^th place)

kb.dk (Global: 8,422^nd place; Estonian: 5,776^th place)

nasa.gov (Global: 12^th place; Estonian: 47^th place)

spacetelescope.org (Global: 1,118^th place; Estonian: 2,785^th place)

ua.edu (Global: 6,314^th place; Estonian: 2,337^th place)

web.archive.org (Global: 1^st place; Estonian: 1^st place)

worldcat.org (Global: 4^th place; Estonian: 18^th place)