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- Continuity of functions defined on the space of fuzzy sets (Kim, Yun Kyong) Inform. Sci. (2003), Vol 157, Pages 155-165
- A characterization of compact subsets of fuzzy number space (Joo, Sang Yeol; Kim, Yun Kyong) Fuzzy Sets and Systems (2001), Vol 123, Pages 191-195
- On the convergence of fuzzy-number-valued functions Fuzzy Sets and Systems (1997), Vol 87, Pages 373-375
- Integrals of fuzzy-number-valued functions (Kim, Yun Kyong) Fuzzy Sets and Systems (1997), Vol 86, Pages 213-222
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