@misc{10_1017_S0008439500030976,
     title = {Problems for {Solution}},
     journal = {Canadian mathematical bulletin},
     pages = {153--154},
     year = {1970},
     volume = {13},
     number = {1},
     doi = {10.1017/S0008439500030976},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500030976/}
}