SHARIFFUDIN, Rio Hirowati. Satu Teknik Baru Dalam Pengendalian Kekangan-kekangan Mudah. MATEMATIKA, [S. l.], v. 7, p. 49–61, 1991. DOI: 10.11113/matematika.v7.n.461. Disponível em: https://matematika.utm.my/index.php/matematika/article/view/461. Acesso em: 25 aug. 2024.