A. Bouillard, Rapport de DEA : Le groupe de traces. LIAFA research report 2002-13, 2002.

A. Bouillard and J. Mairesse, Generating Series of the Trace Group, Developments in Language Theory, pp.159-170, 2003.
DOI : 10.1007/3-540-45007-6_12

P. Cartier and D. Foata, Probì emes combinatoires de commutation et réarrangements, Number Lecture Notes in Mathematics, vol.85, 1969.

V. Diekert, Combinatorics on traces. Number 454 in LNCS, 1990.
DOI : 10.1007/3-540-53031-2

V. Diekert and G. Rozenberg, The Book of Traces, World Scientific, 1995.
DOI : 10.1142/2563

C. Droms, B. Servatius, and H. Servatius, Groups assembled from free and direct products, Discrete Mathematics, vol.109, issue.1-3, pp.69-75, 1992.
DOI : 10.1016/0012-365X(92)90279-O

C. Duboc, Commutations dans les mono¨?desmono¨?des libres : un cadre théorique pour l'´ etude du parallélisme, Also LITP Report, pp.86-111, 1986.

G. Duchamp and D. Krob, PARTIALLY COMMUTATIVE MAGNUS TRANSFORMATIONS, International Journal of Algebra and Computation, vol.03, issue.01, pp.15-41, 1993.
DOI : 10.1142/S0218196793000032
URL : https://hal.archives-ouvertes.fr/hal-00017315

D. Epstein, J. Cannon, D. Holt, S. Levy, M. Paterson et al., Word processing in groups, 1992.

M. Goldwurm and M. Santini, Clique polynomials have a unique root of smallest modulus, Information Processing Letters, vol.75, issue.3, pp.127-132, 2000.
DOI : 10.1016/S0020-0190(00)00086-7

G. Hardy and E. Wright, An introduction to the theory of numbers, Bulletin of the American Mathematical Society, vol.35, issue.6, 1979.
DOI : 10.1090/S0002-9904-1929-04793-1

D. Krob, J. Mairesse, and I. Michos, Computing the average parallelism in trace monoids, Discrete Mathematics, vol.273, issue.1-3, pp.131-162, 2003.
DOI : 10.1016/S0012-365X(03)00233-4
URL : https://hal.archives-ouvertes.fr/hal-00018551

G. Lallement, Semigroups and Combinatorial Applications, 1979.

J. Lewin, The growth function of a graph group, Communications in Algebra, vol.422, issue.5, pp.1187-1191, 1989.
DOI : 10.1016/0022-4049(81)90099-2

G. Rota, On the foundations of combinatorial theory I. Theory of M???bius Functions, Zeitschrift f???r Wahrscheinlichkeitstheorie und Verwandte Gebiete, vol.73, issue.4, pp.340-368, 1964.
DOI : 10.1007/BF00531932

A. Vershik, S. Nechaev, and R. Bikbov, Statistical Properties of Locally Free Groups???with Applications to Braid Groups???and Growth of Random Heaps, Communications in Mathematical Physics, vol.212, issue.2, pp.469-501, 2000.
DOI : 10.1007/s002200000221

G. X. Viennot, Heaps of pieces, I: Basic definitions and combinatorial lemmas, Combinatoiré Enumérative, number 1234 in Lect. Notes in Math, pp.321-350, 1986.