クインテッセンス (宇宙論)
↑ Christopher Wanjek; "Quintessence, accelerating the Universe?" ;http://www.astronomytoday.com/cosmology/quintessence.html
↑ Zlatev, I.; Wang, L.; Steinhardt, P. (1999). “Quintessence, Cosmic Coincidence, and the Cosmological Constant”. Physical Review Letters 82 (5): 896–899. arXiv:astro-ph/9807002. Bibcode: 1999PhRvL..82..896Z. doi:10.1103/PhysRevLett.82.896.
↑ Steinhardt, P.; Wang, L.; Zlatev, I. (1999). “Cosmological tracking solutions”. Physical Review D 59 (12): 123504. arXiv:astro-ph/9812313.