JOSE, Jaya Abraham. Characterizations of Hexagonal Recognizable picture series. Journal of Global Research in Mathematical Archives(JGRMA), [S. l.], v. 5, n. 5, p. 65–71, 2018. Disponível em: https://jgrma.com/index.php/jgrma/article/view/448. Acesso em: 29 apr. 2025.