Lobachevskii Journal of Mathematics
Michael Tsingelis

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Volume XI

A note on pseudocongruences in semigroups

Volume XIII

The embedding of an ordered semigroup into an le-semigroup

Volume XIII

A note on semi-pseudoorders in semigroups

Volume XVIII

On ordered left groups

Volume XXI

Fuzzy interior ideals in ordered semigroups

Volume XXII

Decomposition of commutative ordered semigroups into archimedean components

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