@misc{10_1017_S0008439500031465,
     title = {Problems for {Solution}},
     journal = {Canadian mathematical bulletin},
     pages = {454--460},
     year = {1972},
     volume = {15},
     number = {3},
     doi = {10.1017/S0008439500031465},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500031465/}
}