@article{10_4153_CMB_1987_069_8,
     author = {Daniels, P. and Gruenhage, G.},
     title = {Borel {Sets} in {Metric} {Spaces} {With} {Small} {Separable} {Subsets}},
     journal = {Canadian mathematical bulletin},
     pages = {471--475},
     year = {1987},
     volume = {30},
     number = {4},
     doi = {10.4153/CMB-1987-069-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1987-069-8/}
}