@article{10_37236_2345,
     author = {Imed Zaguia},
     title = {The \(1/3\)-\(2/3\) conjecture for {\(N\)-free} ordered sets},
     journal = {The electronic journal of combinatorics},
     year = {2012},
     volume = {19},
     number = {2},
     doi = {10.37236/2345},
     zbl = {1288.06005},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/2345/}
}