PIMPASALEE, W. Backbone Coloring Problems. KKU Science Journal, [S. l.], v. 47, n. 2, p. 218–224, 2019. Disponível em: https://ph01.tci-thaijo.org/index.php/KKUSciJ/article/view/249996. Acesso em: 19 sep. 2026.