Author: Chvalina, Jan

Hort, Daniel; Chvalina, Jan; Moučka, Jiří: Characterizations of totally ordered sets by their various endomorphisms. (English). Czechoslovak Mathematical Journal, vol. 52 (2002), issue 1, pp. 23-32
Chvalina, Jan: The Iséki-type characterization of certain regular ordered semigroups. (English). Czechoslovak Mathematical Journal, vol. 47 (1997), issue 2, pp. 261-276

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