จิตมนัส อ.; อินทรภักดิ์ ว.; คงนวล ณ. The Relation Between Number of Equilateral Triangle and Triangular Numbers and Number of Rectangle and Square Numbers. KKU Science Journal, [S. l.], v. 46, n. 2, p. 383–392, 2018. Disponível em: https://ph01.tci-thaijo.org/index.php/KKUSciJ/article/view/249891. Acesso em: 19 sep. 2026.