@misc{10_1017_S0008439500029878,
     title = {Openings in {Mathematics}},
     journal = {Canadian mathematical bulletin},
     pages = {653--654},
     year = {1968},
     volume = {11},
     number = {4},
     doi = {10.1017/S0008439500029878},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500029878/}
}