NARANIENGAR, M. T. A Trigonometrical Note. The Journal of the Indian Mathematical Society, [S. l.], v. 3, n. 6, p. 237–238, 1911. DOI: 10.18311/jims/1911/17800. Disponível em: https://informaticsjournals.co.in/index.php/jims/article/view/17800. Acesso em: 8 nov. 2024.