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Algebraic characterizations of trace and decorated trace equivalences over tree-like structuresXIAO JUN CHEN; DE NICOLA, Rocco.Theoretical computer science. 2001, Vol 254, Num 1-2, pp 337-361, issn 0304-3975Article

An algebraic characterization of deterministic regular languages over infinite alphabetsFRANCEZ, Nissim; KAMINSKI, Michael.Theoretical computer science. 2003, Vol 306, Num 1-3, pp 155-175, issn 0304-3975, 21 p.Article

A complete algebraic characterization of behavioral subtypingLEAVENS, G. T; PIGOZZI, D.Acta informatica. 2000, Vol 36, Num 8, pp 617-663, issn 0001-5903Article