Planck Collaboration (2015). "Planck 2015 results. XIII. Cosmological parameters (See Table 4 on page 31 of PDF).". arXiv:1502.01589 16 Haziran 2016 tarihinde Wayback Machine sitesinde arşivlendi..
Planck Collaboration (2015). "Planck 2015 results. XIII. Cosmological parameters (See Table 4 on page 31 of PDF).". arXiv:1502.01589 16 Haziran 2016 tarihinde Wayback Machine sitesinde arşivlendi..