SUBRAMANYAM, S. S. On Collinear Feet of 0-lines of the Sides of a Triangle. The Journal of the Indian Mathematical Society, [S. l.], v. 29, n. 1-2, p. 93–99, 1965. DOI: 10.18311/jims/1965/16828. Disponível em: http://informaticsjournals.com/index.php/jims/article/view/16828. Acesso em: 4 may. 2024.