ZHU, Bin; XU, Zeshui. Extended hesitant fuzzy sets. Technological and Economic Development of Economy, [S. l.], v. 22, n. 1, p. 100–121, 2016. DOI: 10.3846/20294913.2014.981882. Disponível em: https://journals.vilniustech.lt/index.php/TEDE/article/view/692. Acesso em: 9 may. 2025.