@article{10_4153_CJM_2008_013_4,
     author = {Bergeron, Nantel and Reutenauer, Christophe and Rosas, Mercedes and Zabrocki, Mike},
     title = {Invariants and {Coinvariants} of the {Symmetric} {Group} in {Noncommuting} {Variables}},
     journal = {Canadian journal of mathematics},
     pages = {266--296},
     year = {2008},
     volume = {60},
     number = {2},
     doi = {10.4153/CJM-2008-013-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2008-013-4/}
}