@misc{10_1017_S000843950002508X,
     title = {Solutions},
     journal = {Canadian mathematical bulletin},
     pages = {123--124},
     year = {1959},
     volume = {2},
     number = {2},
     doi = {10.1017/S000843950002508X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S000843950002508X/}
}