Lemaître, G. (1927). "Un univers homogène de masse constante et de rayon croissant rendant compte de la vitesse radiale des nébuleuses extra-galactiques". Annales de la Société Scientifique de Bruxelles A (47): 49–59. Bibcode: 1927ASSB...47...49L. Partially translated in Lemaître, G. (1931). "Expansion of the universe, A homogeneous universe of constant mass and increasing radius accounting for the radial velocity of extra-galactic nebulae". Monthly Notices of the Royal Astronomical Society91: 483–490. doi:10.1093/mnras/91.5.483. Bibcode: 1931MNRAS..91..483L.
Lemaître, G. (1927). "Un univers homogène de masse constante et de rayon croissant rendant compte de la vitesse radiale des nébuleuses extra-galactiques". Annales de la Société Scientifique de Bruxelles A (47): 49–59. Bibcode: 1927ASSB...47...49L. Partially translated in Lemaître, G. (1931). "Expansion of the universe, A homogeneous universe of constant mass and increasing radius accounting for the radial velocity of extra-galactic nebulae". Monthly Notices of the Royal Astronomical Society91: 483–490. doi:10.1093/mnras/91.5.483. Bibcode: 1931MNRAS..91..483L.
van den Bergh, S. (2011). "The Curious Case of Lemaitre's Equation No. 24". Journal of the Royal Astronomical Society of Canada105 (4): 151. Bibcode: 2011JRASC.105..151V.
Livio, M. (2011). "Lost in translation: Mystery of the missing text solved". Nature479 (7372): 171. doi:10.1038/479171a. Bibcode: 2011Natur.479..171L.