@article{JAC_2006__23_2_a2,
     author = {Aguiar, Marcelo and Nyman, Kathryn and Orellana, Rosa},
     title = {New results on the peak algebra.},
     journal = {Journal of Algebraic Combinatorics},
     pages = {149--188},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2006__23_2_a2/}
}