@article{10_1090_S1079_6762_04_00140_4,
     author = {Br\"and\'en, Petter},
     title = {Counterexamples to the {Neggers-Stanley} conjecture},
     journal = {Electronic research announcements of the American Mathematical Society},
     pages = {155--158},
     year = {2004},
     volume = {10},
     doi = {10.1090/S1079-6762-04-00140-4},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-04-00140-4/}
}