@article{10_4153_CJM_1970_134_0,
     author = {Jr., Francis T. Christoph},
     title = {Ideal {Extensions} of {Topological} {Semigroups}},
     journal = {Canadian journal of mathematics},
     pages = {1168--1175},
     year = {1970},
     volume = {22},
     number = {6},
     doi = {10.4153/CJM-1970-134-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-134-0/}
}