@article{10_4153_CMB_1978_074_9,
     author = {Ellis, Martin H.},
     title = {Catching and {Missing} {Finite} {Sets}},
     journal = {Canadian mathematical bulletin},
     pages = {419--425},
     year = {1978},
     volume = {21},
     number = {4},
     doi = {10.4153/CMB-1978-074-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1978-074-9/}
}