@article{10_4153_CJM_1972_023_5,
     author = {Stephenson, R. M.},
     title = {Two {R-Closed} {Spaces}},
     journal = {Canadian journal of mathematics},
     pages = {286--292},
     year = {1972},
     volume = {24},
     number = {2},
     doi = {10.4153/CJM-1972-023-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-023-5/}
}