1. Abdul-Jabbar, N., Naoom, J.H., Ouda, E.H.: Fuzzy dual graph. J. Al-Nahrain Univ. 12(4), 168–171 (2009)
2. Akram, M.: Studies in Fuzziness and Soft Computing. Fuzzy Lie algebras, vol. 9, pp. 1–302. Springer, Berlin (2018)
3. Akram, M., Alshehri, N.O.: Tempered interval-valued fuzzy hypergraphs. Sci. Bull. Ser. A Appl. Math. Phys. 77(1), 39–48 (2015)
4. Akram, M., Chen, W.J., Davvaz, B.: On $${\cal{N}}$$-hypergraphs. J. Intell. Fuzzy Syst. 26, 2937–2944 (2014)
5. Berge, C.: Graphs and Hypergraphs. North-Holland, Amsterdam (1973)