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Ronald R. Yager, Alexander Rybalov · Fuzzy Sets and Systems · 1996 · 978 citations
M. Mas, Gaspar Mayor, Joan Torrens · International Journal of Uncertainty Fuzziness and Knowledge-Based Systems · 1999 · 190 citations
On locally internal monotonic operations
Javier Martín · Fuzzy Sets and Systems · 2003 · 127 citations