BHARGAVA, S.; NANJUNDA RAO, S. On an Extremal Theorem of Pinchuk. The Journal of the Indian Mathematical Society, [S. l.], v. 54, n. 1-4, p. 201–207, 1989. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/21892. Acesso em: 2 may. 2024.