@article{10_4153_CJM_1971_094_1,
     author = {Killgrove, R. B. and Frand, Jason and Giles, William and Bray, Henry},
     title = {A {Geometric} {Approach} to the {Heine-Borel} {Theorem}},
     journal = {Canadian journal of mathematics},
     pages = {845--848},
     year = {1971},
     volume = {23},
     number = {5},
     doi = {10.4153/CJM-1971-094-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-094-1/}
}