@misc{10_1017_S0008439500024334,
     title = {Solution by {S.} {Spital,} {California} {State} {Poly.} {College}},
     journal = {Canadian mathematical bulletin},
     pages = {113--116},
     year = {1965},
     volume = {8},
     number = {1},
     doi = {10.1017/S0008439500024334},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500024334/}
}