GALLATLY, W. The Isochord. The Journal of the Indian Mathematical Society, [S. l.], v. 3, n. 5, p. 194–195, 1911. DOI: 10.18311/jims/1911/17795. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/17795. Acesso em: 27 apr. 2024.