Interval-valued Fuzzy Ideals and Bi-ideals of a Semigroup - Cheong, Min-Seok; Hur, Kul (INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGENT SYSTEMS, 2011)
Keywords: 전기공학; interval-valued fuzzy ideal; interval-valued fuzzy set; interval-valued fuzzy bi-ideal; interval-valued fuzzy duo; interval-valued fuzzy semigroup