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• Volume 42

Author: Chajda, Ivan

• Chajda, Ivan: Characterizations of Hamiltonian algebras. (English). Czechoslovak Mathematical Journal, vol. 42 (1992), issue 3, pp. 487-489
• Chajda, Ivan: Varieties with modular and distributive lattices of symmetric or reflexive relations. (English). Czechoslovak Mathematical Journal, vol. 42 (1992), issue 4, pp. 623-630