@misc{10_1017_S0008439500029829,
     title = {Announcement},
     journal = {Canadian mathematical bulletin},
     pages = {525--525},
     year = {1968},
     volume = {11},
     number = {3},
     doi = {10.1017/S0008439500029829},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500029829/}
}