Rujukan Jujukan_utama

  1. ↑ Harding E. Smith (1999-04-21). "The Hertzsprung-Russell Diagram". Gene Smith's Astronomy Tutorial. Center for Astrophysics & Space Sciences, University of California, San Diego. Dicapai 2009-10-29. 
  2. ↑ Richard Powell (2006). "The Hertzsprung Russell Diagram". An Atlas of the Universe. Dicapai 2009-10-29. 
  3. ↑ Adams, Fred C.; Laughlin, Gregory (1997). "A Dying Universe: The Long Term Fate and Evolution of Astrophysical Objects". Reviews of Modern Physics. 69 (2): 337–372. arXiv:astro-ph/9701131 . Bibcode:1997RvMP...69..337A. doi:10.1103/RevModPhys.69.337.  Parameter |month= tidak diketahui diabaikan (bantuan)Selenggaraan CS1: Pelbagai nama: senarai pengarang (link)
  4. ↑ Gilmore, Gerry (2004). "The Short Spectacular Life of a Superstar". Science. 304 (5697): 1915–1916. doi:10.1126/science.1100370. PMID 15218132. Dicapai 2007-05-01.