Luminet, Jean-Pierre2020-02-052021-10-202024-06-272020-02-052021-10-202024-06-272013-06https://drs.ess.gov.et/handle/123456789/104345enExpanding Universe·Generalised Friedmann models·Georges Lemaître·Golden OldieGeorges Lemaître,A homogeneous universe of constant massand increasing radius accounting for the radialvelocity of extra-galactic nebulaeArticle