1. Atanassov, K.: Intuitionistic fuzzy sets. Fuzzy Sets Syst. 20(1), 87–96 (1986)
2. Baskak, M., Kahraman, C.: Fuzzy replacement analysis. Conference of the North American: Fuzzy Information Processing Society (1998)
3. Buckley, J.J.: The fuzzy mathematics of finance. Fuzzy Sets Syst. 1987(21), 257273 (1987)
4. Dick, S., Yager, R.R., Yazdanbakhsh, O.: On Pythagorean and complex fuzzy set operations. IEEE Trans. Fuzzy Syst. 24(5), 1009–1021 (2016)
5. Dimitrovski, A., Matos, M.: Fuzzy present worth analysis with correlated and uncorrelated cash flows. In: Kahraman, C. (ed.) Fuzzy Engineering Economics with Applications. Springer, Heidelberg (2008)