Romli Noor Ahmad
Suatu tinjauan tentang subset fuzzy dan aplikasinya
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1985
 UI - Skripsi Membership
Kandel, Abraham
Fuzzy mathematical techniques with applications
Addison-Wesley, 1986
 Buku Teks SO
Fuzzy sets and their applications to cognitive and decision processes
edited by Lotfi A. Zade ... [and others]
Academic Press, 1975
 Buku Teks SO
Phil Kim
Comparing goverment performance indicators: a fuzzy-set analysis
Seoul National University, 2019
 Artikel Jurnal
Pal, Sankar K.
Fuzzy : pendekatan matematik untuk pengenalan pola=Fuzzy mathematical approach to pattern recognition
UI-Press, 1989
 Buku Teks SO