@article{10_4153_CJM_1967_063_3,
     author = {Dorroh, J. R.},
     title = {Semi-Groups of {Maps} in a {Locally} {Compact} {Space}},
     journal = {Canadian journal of mathematics},
     pages = {688--696},
     year = {1967},
     volume = {19},
     number = {1},
     doi = {10.4153/CJM-1967-063-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-063-3/}
}