SHOBE, Nabi; SEDGHI, Shaban; RAMANE, Harishchandra S. Rough approximations in graphs using neighborhood of vertices. Journal of Global Research in Mathematical Archives(JGRMA), [S. l.], v. 2, n. 9, p. 16–28, 2015. Disponível em: https://www.jgrma.com/index.php/jgrma/article/view/243. Acesso em: 11 may. 2025.