Concave type-2 fuzzy sets: properties and operations. - Hooman Tahayori; Andrea Tettamanzi; Giovanni Degli Antoni; Andrea Visconti; Masoomeh Moharrer (Soft Comput., 2010)

Modeling Complex Concepts with Type-2 Fuzzy Sets: The Case of User Satisfaction of Online Services. - Masoomeh Moharrer; Hooman Tahayori; Alireza Sadeghian (Advances in Type-2 Fuzzy Sets and Systems, 2013)

Interval type-2 fuzzy sets to model linguistic label perception in online services satisfaction. - Masoomeh Moharrer; Hooman Tahayori; Lorenzo Livi; Alireza Sadeghian; Antonello Rizzi (Soft Comput., 2015)