1. G. Duchamp, A. Klyachko, D. Krob and J.-Y. Thibon, Noncommutative symmetric functions III: Deformations of Cauchy and convolution algebras, Disc. Math. and Theor. Comput. Sci. 1 (1997), 159 - 216.
2. G. Duchamp, D. Krob, B. Leclerc and J.-Y.Thibon, Fonctions quasi-symétriques, fonctions symétriques non commutatives, et algèbres de Hecke à q = 0, C.R. Acad. Sci. Paris, 322 (1996), 107 - 112.
3. I.M. Gelfand, D. Krob, B. Leclerc, A. Lascoux, V.S. Retakh and J.-Y.Thibon, Noncommutative symmetric functions, Adv. in Math., 112 (1995), 218 - 348.
4. I. Gessel, Multipartite P-partitions and inner products of skew Schur functions,[in "Combinatorics and algebra", C. Greene, Ed.], Contemporary Mathematics, 34 (1984), 289-301.
5. J.-L. Loday and M. Ronco, Hopf algebra of the planarbinary trees, Adv. in Math. 139 (1998), 293 - 309.