@article{10_4153_CMB_1994_060_0,
     author = {Tsuda, K\^oichi},
     title = {Universal {Spaces} for {Closed} {Images} of {\ensuremath{\sigma}-Discrete} {Metric} {Spaces}},
     journal = {Canadian mathematical bulletin},
     pages = {419--427},
     year = {1994},
     volume = {37},
     number = {3},
     doi = {10.4153/CMB-1994-060-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1994-060-0/}
}