@article{10_4153_CMB_1971_007_1,
     author = {Graham, R. L. and Spencer, J. H.},
     title = {A {Constructive} {Solution} to a {Tournament} {Problem}},
     journal = {Canadian mathematical bulletin},
     pages = {45--48},
     year = {1971},
     volume = {14},
     number = {1},
     doi = {10.4153/CMB-1971-007-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-007-1/}
}