Journal of Mathematical Analysis and Applications · 1981 · 381 citations · 2 references
Natural SciencesMathematicsSet TheoryGroup StructureGroup TheoryFuzzy SetsSubgroup Structure
2
L. A. Zadeh · Information and Control · 1965 · 66.1K citations
Azriel Rosenfeld · Journal of Mathematical Analysis and Applications · 1971 · 1.3K citations