Miller-Jones, James C. A.; Bahramian, Arash; Orosz, Jerome A. et al. (2021-03-05). “Cygnus X-1 contains a 21-solar mass black hole-Implications for massive star winds”. Science (American Association for the Advancement of Science (AAAS)) 371 (6533): 1046-1049. arXiv:2102.09091. Bibcode: 2021Sci...371.1046M. doi:10.1126/science.abb3363. ISSN0036-8075.
Mirabel, I. Félix; Rodrigues, Irapuan (2003-05-16). “Formation of a Black Hole in the Dark”. Science (American Association for the Advancement of Science (AAAS)) 300 (5622): 1119-1120. arXiv:astro-ph/0305205. doi:10.1126/science.1083451. ISSN0036-8075.
Miller-Jones, James C. A.; Bahramian, Arash; Orosz, Jerome A. et al. (2021-03-05). “Cygnus X-1 contains a 21-solar mass black hole-Implications for massive star winds”. Science (American Association for the Advancement of Science (AAAS)) 371 (6533): 1046-1049. arXiv:2102.09091. Bibcode: 2021Sci...371.1046M. doi:10.1126/science.abb3363. ISSN0036-8075.
Mirabel, I. Félix; Rodrigues, Irapuan (2003-05-16). “Formation of a Black Hole in the Dark”. Science (American Association for the Advancement of Science (AAAS)) 300 (5622): 1119-1120. arXiv:astro-ph/0305205. doi:10.1126/science.1083451. ISSN0036-8075.
Miller-Jones, James C. A.; Bahramian, Arash; Orosz, Jerome A. et al. (2021-03-05). “Cygnus X-1 contains a 21-solar mass black hole-Implications for massive star winds”. Science (American Association for the Advancement of Science (AAAS)) 371 (6533): 1046-1049. arXiv:2102.09091. Bibcode: 2021Sci...371.1046M. doi:10.1126/science.abb3363. ISSN0036-8075.
Miller-Jones, James C. A.; Bahramian, Arash; Orosz, Jerome A. et al. (2021-03-05). “Cygnus X-1 contains a 21-solar mass black hole-Implications for massive star winds”. Science (American Association for the Advancement of Science (AAAS)) 371 (6533): 1046-1049. arXiv:2102.09091. Bibcode: 2021Sci...371.1046M. doi:10.1126/science.abb3363. ISSN0036-8075.
Mirabel, I. Félix; Rodrigues, Irapuan (2003-05-16). “Formation of a Black Hole in the Dark”. Science (American Association for the Advancement of Science (AAAS)) 300 (5622): 1119-1120. arXiv:astro-ph/0305205. doi:10.1126/science.1083451. ISSN0036-8075.
worldcat.org
Hawking, Stephen (1998). A brief history of time. New York: Bantam Books. pp. 97-98. ISBN0-553-38016-8. OCLC39256652