@article{10_37236_1043,
     author = {Marcelo Aguiar and Walter Moreira},
     title = {Combinatorics of the free {Baxter} algebra},
     journal = {The electronic journal of combinatorics},
     year = {2006},
     volume = {13},
     doi = {10.37236/1043},
     zbl = {1085.05006},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1043/}
}