ABDOUNUR, Oscar João. A preliminary survey on the emergence of an arithmetical theory of ratios. Circumscribere International Journal for the History of Science, [S. l.], v. 7, p. 1–8, 2009. Disponível em: https://revistas.pucsp.br/index.php/circumhc/article/view/2757. Acesso em: 5 dec. 2025.