@article{10_4153_CMB_1964_001_5,
     author = {Banaschewski, Bernhard},
     title = {Extensions of {Topological} {Spaces}},
     journal = {Canadian mathematical bulletin},
     pages = {1--22},
     year = {1964},
     volume = {7},
     number = {1},
     doi = {10.4153/CMB-1964-001-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1964-001-5/}
}