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• Volume 40

Author: Niederle, Josef

• Niederle, Josef: Frame tolerances are directly decomposable. (English). Czechoslovak Mathematical Journal, vol. 40 (1990), issue 3, pp. 422-423
• Niederle, Josef: Notes on lattices of frame tolerances. (English). Czechoslovak Mathematical Journal, vol. 40 (1990), issue 3, pp. 468-471
• Niederle, Josef: Transitivity of principal tolerances is not a Mal'cev property. (English). Czechoslovak Mathematical Journal, vol. 40 (1990), issue 4, pp. 563-565