@article{10_4153_CJM_1978_041_6,
     author = {Shapiro, H. L. and Smith, F. A.},
     title = {Even {Covers} and {Collectionwise} {Normal} {Spaces}},
     journal = {Canadian journal of mathematics},
     pages = {466--473},
     year = {1978},
     volume = {30},
     number = {3},
     doi = {10.4153/CJM-1978-041-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1978-041-6/}
}