YASMIN, Nusrat; ASHRAF, Muhammad. NUMBER OF PERIODIC SOLUTIONS OF CLASSES C2,4 AND C4,3. Journal of Research (Science), [S. l.], v. 14, n. 2, p. Pages: 225–234, 2003. Disponível em: http://jorscience.com/index.php/JRS/article/view/157. Acesso em: 7 jul. 2025.