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• Volume 53

Author: Halaš, Radomír

• Halaš, Radomír: Annihilators in BCK-algebras. (English). Czechoslovak Mathematical Journal, vol. 53 (2003), issue 4, pp. 1001-1007
• Halaš, Radomír; Hort, Daniel: A characterization of 1-, 2-, 3-, 4-homomorphisms of ordered sets. (English). Czechoslovak Mathematical Journal, vol. 53 (2003), issue 1, pp. 213-221