RIZVI, V. A. . ’UMAR KHAYYĀM AS A GEOMETRICIAN—A SURVEY . Islamic Studies, [S. l.], v. 24, n. 02, p. 193–204, 1985. Disponível em: http://irigs.iiu.edu.pk:64447/ojs/index.php/islamicstudies/article/view/5844. Acesso em: 6 dec. 2025.