@article{10_4153_CMB_1968_072_x,
     author = {Subbarao, M.V.},
     title = {On a {Theorem} of {Erd\"os} and {Szekeres}},
     journal = {Canadian mathematical bulletin},
     pages = {597--598},
     year = {1968},
     volume = {11},
     number = {4},
     doi = {10.4153/CMB-1968-072-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1968-072-x/}
}