Nguyễn, Hóa, Sơn Hoàng Lê, & Thông Huy Phạm. " Some Improvements of Fuzzy Clustering Algorithms Using Picture Fuzzy Sets and Applications For Geographic Data Clustering." VNU Journal of Science: Computer Science and Communication Engineering [Online], 32.3 (2016): n. pag. Web. 20 Nov. 2024