KALIMUTHU, S. On freedman equation and the shape of our universe. Annals of Mathematics and Physics, [S. l.], v. 3, n. 1, p. 030–031, 2020. DOI: 10.17352/amp.000015. Disponível em: https://www.mathematicsgroup.com/amp/article/view/AMP-3-115. Acesso em: 20 aug. 2025.