@article{JAC_2006__23_1_a0,
     author = {Panyushev, Dmitri I.},
     title = {The poset of positive roots and its relatives},
     journal = {Journal of Algebraic Combinatorics},
     pages = {79--101},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2006__23_1_a0/}
}