1. Dubois, D., Prade, H.: Operations on fuzzy numbers. Int. J. Syst. Sci. 9(6), 613–626 (1978)
2. Victor Devadoss, A., Felix, A.: A new Fuzzy DEMATEL method in an uncertain linguistic environment. Adv. Fuzzy Sets Syst. 16(2), 93–123 (2013)
3. Rajarajeshwari, P., Sudha, A.S., Karthika, R.: A new operation on hexagonal fuzzy number. Int. J. Fuzzy Logic Syst. 3(3), 15–26 (2013)
4. Malini, S.U., Kennedy, F.C.: An approach for solving fuzzy transportation using octagonal fuzzy numbers. Appl. Math. Sci. 54, 2661–2673 (2013)
5. Namarta, U.C.G., Thakur, N.I.: Solution of fuzzy game problem by using decagonal fuzzy numbers. Int. J. Sci. Eng. Res. 8(12). ISSN 2229–5518