SOME FRIEDMANN- ROBERTSON-WALKER (FRW) MODELS. International Journal of Food and Nutritional Sciences, [S. l.], v. 11, n. 10, p. 5101–5106, 2022. Disponível em: https://www.ijfans.org/index.php/Journal/article/view/11268. Acesso em: 14 aug. 2026.