@article{10_4153_CMB_1981_041_4,
     author = {Lawrence, John},
     title = {A {Note} on the {Density} {Theorem}},
     journal = {Canadian mathematical bulletin},
     pages = {249--249},
     year = {1981},
     volume = {24},
     number = {2},
     doi = {10.4153/CMB-1981-041-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1981-041-4/}
}