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• Volume 28

Author: Pták, Vlastimil

• Fiedler, Miroslav; Pták, Vlastimil: Diagonals of convex sets. (English). Czechoslovak Mathematical Journal, vol. 28 (1978), issue 1, pp. 25-44
• Fiedler, Miroslav; Pták, Vlastimil: The rank of extreme positive operators on polyhedral cones. (English). Czechoslovak Mathematical Journal, vol. 28 (1978), issue 1, pp. 45-(55)