@misc{10_4153_CMB_1970_096_2,
     title = {A {Note} on {Endomorphism} {Semigroups}},
     journal = {Canadian mathematical bulletin},
     pages = {526--526},
     year = {1970},
     volume = {13},
     number = {4},
     doi = {10.4153/CMB-1970-096-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-096-2/}
}