The monoid of strong endomorphisms of a graph.
Li, W.
Semigroup forum, Tome 48 (1994), p. 143-150 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1994-01-01
EUDML-ID : urn:eudml:doc:135343 
@article{GDZPPN001263633,
     title = {The monoid of strong endomorphisms of a graph.},
     journal = {Semigroup forum},
     volume = {48},
     year = {1994},
     pages = {143-150},
     zbl = {0808.20055},
     url = {http://dml.mathdoc.fr/item/GDZPPN001263633}
}

Li, W. The monoid of strong endomorphisms of a graph.. Semigroup forum, Tome 48 (1994) pp. 143-150. http://gdmltest.u-ga.fr/item/GDZPPN001263633/