A Characterization of Set Representable Labeled Partial 2-Structures Through Decompositions.

Andrzej Ehrenfeucht Grzegorz Rozenberg A Characterization of Set Representable Labeled Partial 2-Structures Through Decompositions. 83-94 1990 28 Acta Inf. 1 db/journals/acta/acta28.html#EhrenfeuchtR90