S. Aarseth, D. Lin, and J. Papaloizou, On the collapse and violent relaxation of protoglobular clusters, The Astrophysical Journal, vol.324, p.288, 1988.
DOI : 10.1086/165895

L. Aguilar and D. Merritt, The structure and dynamics of galaxies formed by cold dissipationless collapse, The Astrophysical Journal, vol.354, p.33, 1990.
DOI : 10.1086/168665

E. I. Barnes, P. A. Lanzel, and L. L. Williams, -BODY SIMULATIONS, The Astrophysical Journal, vol.704, issue.1, p.372, 2009.
DOI : 10.1088/0004-637X/704/1/372

D. Benhaiem and F. Labini, Violent relaxation of ellipsoidal clouds, Monthly Notices of the Royal Astronomical Society, vol.446, issue.3, p.2634, 2015.
DOI : 10.1093/mnras/stu2159

D. Benhaiem, F. Labini, C. Boily, E. Athanassoula, and P. Kroupa, Formation of satellites from cold collapse, Astronomy & Astrophysics, vol.466, issue.332, pp.95-971, 2002.
DOI : 10.1086/162386
URL : https://hal.archives-ouvertes.fr/hal-01554785

M. David and T. Theuns, Numerical experiments on radial virial oscillations in N-body systems, Monthly Notices of the Royal Astronomical Society, vol.240, issue.4, p.957, 1989.
DOI : 10.1093/mnras/240.4.957

B. G. Elmegreen, P. E. Seiden, and D. M. Elmegreen, Spiral arm amplitude variations and pattern speeds in the grand design galaxies M51, M81, and M100, The Astrophysical Journal, vol.343, p.602, 1989.
DOI : 10.1086/167733

A. L. Henry, A. C. Quillen, and R. Gutermuth, Star Formation and Asymmetry in the Spiral Arms of M51: Variable Star Formation Caused by More than One Spiral Density Wave, The Astronomical Journal, vol.126, issue.6, p.2831, 2003.
DOI : 10.1086/379299

M. Joyce, B. Marcos, and F. Labini, Energy ejection in the collapse of a cold spherical self-gravitating cloud, Monthly Notices of the Royal Astronomical Society, vol.284, issue.2, p.775, 2009.
DOI : 10.1093/mnras/201.4.939
URL : https://hal.archives-ouvertes.fr/in2p3-00463667

P. M. Kalberla and L. Dedes, distribution in the outer Milky Way, Astronomy & Astrophysics, vol.230, issue.3, p.951, 2008.
DOI : 10.1086/368016

M. López-corredoira and C. González-fernández, RADIAL MOTIONS IN DISK STARS: ELLIPTICITY OR SECULAR FLOWS?, The Astronomical Journal, vol.151, issue.6, p.165, 2016.
DOI : 10.3847/0004-6256/151/6/165

M. Milgrom, A modification of the Newtonian dynamics as a possible alternative to the hidden mass hypothesis, The Astrophysical Journal, vol.270, p.365, 1983.
DOI : 10.1086/161130

S. Labini and F. , Violent and mild relaxation of an isolated self-gravitating uniform and spherical cloud of particles, Monthly Notices of the Royal Astronomical Society, vol.78, issue.2, p.1610, 2012.
DOI : 10.1103/PhysRevE.78.041114

S. Labini and F. , Universal properties of violently relaxed gravitational structures, Monthly Notices of the Royal Astronomical Society, vol.201, issue.1, p.679, 2013.
DOI : 10.1007/978-94-009-3971-4_28

S. N. Vogel, R. J. Rand, R. A. Gruendl, and P. J. Teuben, H-alpha Fabry-Perot observations of the density-wave pattern in M51, Publications of the Astronomical Society of the Pacific, vol.105, p.666, 1993.
DOI : 10.1086/133217