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L. A. Zadeh · Information and Control · 1965 · 66.1K citations
Azriel Rosenfeld · Journal of Mathematical Analysis and Applications · 1971 · 1.3K citations
Fuzzy subgroups and anti fuzzy subgroups
Ranjit Biswas · Fuzzy Sets and Systems · 1990 · 141 citations
Bijan Davvaz · Fuzzy Sets and Systems · 1999 · 118 citations
Fuzzy vector spaces and fuzzy cosets
Fuzzy Sets and Systems · 1992 · 24 citations