@misc{10_1017_S000843950003215X,
     title = {Openings in {Mathematics}},
     journal = {Canadian mathematical bulletin},
     pages = {511--512},
     year = {1964},
     volume = {7},
     number = {3},
     doi = {10.1017/S000843950003215X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S000843950003215X/}
}