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Author: Shishkov, Ivailo

• Shishkov, Ivailo: $\Sigma$-products and selections of set-valued mappings. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 42 (2001), issue 1, pp. 203-207
• Shishkov, Ivailo: Hereditarily normal Katětov spaces and extending of usco mappings. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 41 (2000), issue 1, pp. 183-196