%0 Journal Article %A Panyushev, Dmitri I. %T The poset of positive roots and its relatives %J Journal of Algebraic Combinatorics %D 2006 %P 79-101 %V 23 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/JAC_2006__23_1_a0/ %G en %F JAC_2006__23_1_a0