@article{SF_1972__4_133907,
     author = {E. Mendelsohn},
     title = {On a technique for representing semigroups as endomorphism semigroups of graphs with given property.},
     journal = {Semigroup forum},
     pages = {283--294},
     publisher = {mathdoc},
     volume = {4},
     year = {1972},
     zbl = {0262.20083},
     url = {http://geodesic.mathdoc.fr/item/SF_1972__4_133907/}
}