VYTHYNATHASWAMY, R. Note on the Length of a Circular Arc. The Journal of the Indian Mathematical Society, [S. l.], v. 6, n. 6, p. 220–221, 1914. DOI: 10.18311/jims/1914/17687. Disponível em: http://informaticsjournals.com/index.php/jims/article/view/17687. Acesso em: 2 may. 2024.