Wyniki
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Equivalential fragment of the infinite valued logic of Lukasiewicz and the intermediate logics
Piotr S. Krzystek
Bulletin of the Section of Logic , 9 /4 (1980) s. 170-175 -
Commutative BCK-algebras do not enjoy the interpolation property
Piotr S. Krzystek
Bulletin of the Section of Logic , 12 /2 (1983) s. 50-54 -
On free relatively pseudocomplemented semilattice with three generators
Piotr S. Krzystek
Bulletin of the Section of Logic , 6 /3 (1977) s. 116-122