@article{10_4153_CJM_1970_138_3,
     author = {Vaughan, J. E.},
     title = {Perfect {Mappings} and {Spaces} of {Countable} {Type}},
     journal = {Canadian journal of mathematics},
     pages = {1208--1210},
     year = {1970},
     volume = {22},
     number = {6},
     doi = {10.4153/CJM-1970-138-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-138-3/}
}