@article{10_4153_CMB_1975_117_x,
     author = {Grant, Douglass L.},
     title = {The {Open} {Mapping} and {Closed} {Graph} {Theorem} for {Embeddable} {Topological} {Semigroups}},
     journal = {Canadian mathematical bulletin},
     pages = {671--674},
     year = {1975},
     volume = {18},
     number = {5},
     doi = {10.4153/CMB-1975-117-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-117-x/}
}