NARANIENGAR, M. T. On the Locus of Points at which Opposite Sides of a Quadrilateral Subtend Equal or Supplementary Angles. The Journal of the Indian Mathematical Society, [S. l.], v. 3, n. 4, p. 132–140, 1911. DOI: 10.18311/jims/1911/17802. Disponível em: http://www.informaticsjournals.com/index.php/jims/article/view/17802. Acesso em: 14 may. 2024.