Banker, R. D., Charnes, A., & Cooper, W. W. (1984). Some models for estimating technical and scale inefficiencies in data envelopment analysis. Management science, 30(9), 1078-1092.
 Zadeh, L. A. (1965). Fuzzy sets. Information and control, 8(3), 338-353.
 Atanassov, K. (2016). Intuitionistic fuzzy sets. International Journal Bioautomation, 20, 1.
 Edalatpanah, S. A. (2019). A data envelopment analysis model with triangular intuitionistic fuzzy numbers. International journal of data envelopment analysis, 7(4), 47-58.
 Charnes, A., & Cooper, W. W. (1984). Preface to topics in data envelopment analysis. Annals of operations research, 2(1), 59-94.
 Charnes, A., Cooper, W. W., & Rhodes, E. (1978). Measuring the efficiency of decision making units. European journal of operational research, 2(6), 429-444.
 Farrell, M. J. (1957). The measurement of productive efficiency. Journal of the royal statistical society: series A (General), 120(3), 253-281.
 Edalatpanah, S. A. (2018). Neutrosophic perspective on DEA. Journal of applied research on industrial engineering, 5(4), 339-345.
 Mashayekhi, Z., & Omrani, H. (2016). An integrated multi-objective Markowitz–DEA cross-efficiency model with fuzzy returns for portfolio selection problem. Applied soft computing, 38, 1-9.
 Chen, W., Gai, Y., & Gupta, P. (2018). Efficiency evaluation of fuzzy portfolio in different risk measures via DEA. Annals of operations research, 269(1-2), 103-127.
 Tavana, M., Keramatpour, M., Santos-Arteaga, F. J., & Ghorbaniane, E. (2015). A fuzzy hybrid project portfolio selection method using data envelopment analysis, TOPSIS and integer programming. Expert systems with applications, 42(22), 8432-8444.
 Cooper, W. W., Seiford, L. M., & Tone, K. (2001). Data envelopment analysis: A comprehensive text with models, applications, references and DEA-solver software. Journal-operational research society, 52(12), 1408-1409.
 Najafi, H. S., & Edalatpanah, S. A. (2013). An improved model for iterative algorithms in fuzzy linear systems. Computational mathematics and modeling, 24(3), 443-451.
 Edalatpanah, S. A. (2020). Data envelopment analysis based on triangular neutrosophic numbers. CAAI transactions on intelligence technology. DOI: 10.1049/trit.2020.0016.
 Chen, W., Li, S. S., Zhang, J., & Mehlawat, M. K. (2020). A comprehensive model for fuzzy multi-objective portfolio selection based on DEA cross-efficiency model. Soft computing, 24(4), 2515-2526.
 Edirisinghe, N. C., & Zhang, X. (2007). Generalized DEA model of fundamental analysis and its application to portfolio optimization. Journal of banking & finance, 31(11), 3311-3335.
 Mehlawat, M. K., Kumar, A., Yadav, S., & Chen, W. (2018). Data envelopment analysis based fuzzy multi-objective portfolio selection model involving higher moments. Information sciences, 460, 128-150.
 Banker, R. D., Charnes, A., & Cooper, W. W. (1984). Some models for estimating technical and scale inefficiencies in data envelopment analysis. Management science, 30(9), 1078-1092.