WARREN, A. T. Borcbardt and Perrott:Geometry for Schools. The Journal of the Indian Mathematical Society, [S. l.], v. 4, n. 4, p. 146–146, 1912. DOI: 10.18311/jims/1912/17764. Disponível em: http://informaticsjournals.com/index.php/jims/article/view/17764. Acesso em: 7 may. 2024.