@article{10_4153_CJM_1978_027_7,
     author = {Hodel, R. E.},
     title = {The {Number} of {Closed} {Subsets} of a {Topological} {Space}},
     journal = {Canadian journal of mathematics},
     pages = {301--314},
     year = {1978},
     volume = {30},
     number = {2},
     doi = {10.4153/CJM-1978-027-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1978-027-7/}
}