BHIMASENA RAO, M. Contact Circle Touching the Nine-Point Circle. The Journal of the Indian Mathematical Society, [S. l.], v. 3, n. 4, p. 147–149, 1911. DOI: 10.18311/jims/1911/17804. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/17804. Acesso em: 4 may. 2024.