[2] Jürgensen H.: Thierin G.: Semigroups with each element disjunctive. Institut für Theoretische Informatik Darmstadt, TI-17/79, 1979.
[3] Kopeček I.:
Distinguishing subsets in general algebras. Čas. pro pěst. mat., 106(1981), 94-100.
MR 0613712
[4] Novotný M.:
On some relations defined by languages. Prague Studies in Math. Linguistics 4, 1972, 157-170.
MR 0483771
[5] Opp M.: Charakterisierungen erkennbarer Termmengungen in absolut freien universelen Algebren. Bericht Nr. 20. Institut für Informatik, Hamburg 1976.
[6] Schein B. M.:
Homomorphisms and subdirect decomposition of semigroups. Pacific J. Math. 17 (1966), 529-547.
MR 0197603
[7] Schützenberger M. P.:
Une theorie algebrique du codage. C. R. Acad. Sc. Paris 242 (1956), 862-864.
MR 0075169
[8] Shyr H. J.:
Disjunctive languages on a free monoid. Information and Control 34 (1977), 123-129.
MR 0443460 |
Zbl 0354.68108
[9] Szász G.:
Introduction to Lattice Theory. Budapest, Akadémiai Kiadó, 1963.
MR 0166118
[10] Tully E. J., Jr.: Representation of semigroups by transformation of a set. Dissertation, Tulane Univ., I960.
[11] Zapletal J.:
Distinguishing subsets of semigroups and groups. Arch. Math. Brno 4 (1968), 241-250.
MR 0263958 |
Zbl 0325.20059
[12] Zapletal J.:
Distinguishing subsets in semilattices. Arch. Math. Brno 2 (1973), 73-82.
MR 0364513
[13] Zapletal J.:
On the characterization of semilattices satisfying the descending chain condition and some remarks on distinguishing subsets. Arch. Math., Brno 2 (1973), 123-128.
MR 0379720