@article{10_4153_CMB_1971_028_8,
     author = {Chv\'atal, V. and Koml\'{o}s, J.},
     title = {Some {Combinatorial} {Theorems} on {Monotonicity}},
     journal = {Canadian mathematical bulletin},
     pages = {151--157},
     year = {1971},
     volume = {14},
     number = {2},
     doi = {10.4153/CMB-1971-028-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-028-8/}
}