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- A nonstandard approach to fuzzy set theory / edit. Costas A. Drossos, George Markakis, M. Shakhatreh. 1992. Vol. 28, Suppl. No. 3 - Praha : ÚTIA, 1992 - s. 41-64(Kybernetika; Suppl. No. 3) [1, currently available 0, at library only 1]
- Chapters, articles