@misc{10_1017_S0008439500025753,
     title = {Problems for {Solution}},
     journal = {Canadian mathematical bulletin},
     pages = {187--187},
     year = {1961},
     volume = {4},
     number = {2},
     doi = {10.1017/S0008439500025753},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500025753/}
}