Mendelsohn, E. An elementary characterization of the category of relational systems. (English) Zbl 0241.08001 Commentat. Math. Univ. Carol. 10, 571-588 (1969). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 08A05 Structure theory of algebraic structures 18B99 Special categories PDF BibTeX XML Cite \textit{E. Mendelsohn}, Commentat. Math. Univ. Carol. 10, 571--588 (1969; Zbl 0241.08001) Full Text: EuDML OpenURL