DURAIRAJAN, N. A Special Tetrahedron. The Journal of the Indian Mathematical Society, [S. l.], v. 5, n. 6, p. 216–219, 1913. DOI: 10.18311/jims/1913/17721. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/17721. Acesso em: 9 may. 2024.