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• Volume 21

Author: Frolík, Zdeněk

• Frolík, Zdeněk: Luzin sets are additive. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 21 (1980), issue 3, pp. 527-533
• Frolík, Zdeněk; Holický, Petr: Selections using orderings (non-separable case). (English). Commentationes Mathematicae Universitatis Carolinae, vol. 21 (1980), issue 4, pp. 653-661