PARANJPE, B. P. The Equilateral Triangle by Paper-Folding. The Journal of the Indian Mathematical Society, [S. l.], v. 3, n. 4, p. 151–152, 1911. DOI: 10.18311/jims/1911/17806. Disponível em: http://www.informaticsjournals.com/index.php/jims/article/view/17806. Acesso em: 14 may. 2024.