@article{10_4153_CMB_1980_058_6,
     author = {Bell, Murray and Ginsburg, John},
     title = {First {Countable} {Lindel\"of} {Extensions} of {Uncountable} {Discrete} {Spaces}},
     journal = {Canadian mathematical bulletin},
     pages = {397--399},
     year = {1980},
     volume = {23},
     number = {4},
     doi = {10.4153/CMB-1980-058-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1980-058-6/}
}