T. Vicsek and A. Zafeiris, Collective motion, Physics Reports, vol.517, issue.3-4, p.71, 2012.
DOI : 10.1016/j.physrep.2012.03.004

M. C. Marchetti, J. F. Joanny, S. Ramaswamy, T. B. Liverpool, J. Prost et al., Hydrodynamics of soft active matter, Reviews of Modern Physics, vol.85, issue.3, p.1143, 2013.
DOI : 10.1103/RevModPhys.85.1143

G. Grégoire and H. Chaté, Onset of Collective and Cohesive Motion, Physical Review Letters, vol.92, issue.2, p.25702, 2004.
DOI : 10.1103/PhysRevLett.92.025702

H. Chaté, F. Ginelli, G. Grégoire, and F. Raynaud, Collective motion of self-propelled particles interacting without cohesion, Physical Review E, vol.77, issue.4, p.46113, 2008.
DOI : 10.1103/PhysRevE.77.046113

V. Schaller, C. Weber, C. Semmrich, E. Frey, and A. R. Bausch, Polar patterns of driven filaments, Nature, vol.317, issue.7311, p.73, 2010.
DOI : 10.1038/nature09312

A. Bricard, J. B. Caussin, N. Desreumaux, O. Dauchot, and D. Bartolo, Emergence of macroscopic directed motion in populations of motile colloids, Nature, vol.179, issue.7474, p.95, 2013.
DOI : 10.1038/nature12673
URL : https://hal.archives-ouvertes.fr/hal-01422384

T. Ihle, Invasion-wave-induced first-order phase transition in systems of active particles, Physical Review E, vol.88, issue.4, p.40303, 2013.
DOI : 10.1103/PhysRevE.88.040303

A. P. Solon and J. Tailleur, Revisiting the Flocking Transition Using Active Spins, Physical Review Letters, vol.111, issue.7, p.78101, 2013.
DOI : 10.1103/PhysRevLett.111.078101
URL : https://hal.archives-ouvertes.fr/hal-00903641

S. Mishra, A. Baskaran, and M. C. Marchetti, Fluctuations and pattern formation in self-propelled particles, Physical Review E, vol.81, issue.6, p.61916, 2010.
DOI : 10.1103/PhysRevE.81.061916

A. Gopinath, M. F. Hagan, M. C. Marchetti, and A. Baskaran, Dynamical self-regulation in self-propelled particle flows, Physical Review E, vol.85, issue.6, p.61903, 2012.
DOI : 10.1103/PhysRevE.85.061903

C. A. Weber, T. Hanke, J. Deseigne, S. Léonard, O. Dauchot et al., Long-Range Ordering of Vibrated Polar Disks, Physical Review Letters, vol.110, issue.20, p.208001, 2013.
DOI : 10.1103/PhysRevLett.110.208001
URL : https://hal.archives-ouvertes.fr/hal-01422385

P. Romanczuk and L. Schimansky-geier, Mean-field theory of collective motion due to velocity alignment, Ecological Complexity, vol.10, p.83, 2012.
DOI : 10.1016/j.ecocom.2011.07.008

J. Toner and Y. Tu, Model: How Birds Fly Together, Physical Review Letters, vol.75, issue.23, p.4326, 1995.
DOI : 10.1103/PhysRevLett.75.4326

A. Peshkov, S. Ngo, E. Bertin, H. Chaté, and F. Ginelli, Continuous Theory of Active Matter Systems with Metric-Free Interactions, Physical Review Letters, vol.109, issue.9, p.98101, 2012.
DOI : 10.1103/PhysRevLett.109.098101
URL : https://hal.archives-ouvertes.fr/hal-00910347

F. D. Farrell, M. C. Marchetti, D. Marenduzzo, and J. Tailleur, Pattern Formation in Self-Propelled Particles with Density-Dependent Motility, Physical Review Letters, vol.108, issue.24, p.248101, 2012.
DOI : 10.1103/PhysRevLett.108.248101
URL : https://hal.archives-ouvertes.fr/hal-00749041

T. Ihle, Kinetic theory of flocking: Derivation of hydrodynamic equations, Physical Review E, vol.83, issue.3, p.30901, 2011.
DOI : 10.1103/PhysRevE.83.030901

A. Baskaran and M. C. Marchetti, Hydrodynamics of self-propelled hard rods, Physical Review E, vol.77, issue.1, p.11920, 2008.
DOI : 10.1103/PhysRevE.77.011920

B. I. Halperin, T. C. Lubensky, and S. Ma, Liquid Crystals, Physical Review Letters, vol.32, issue.6, p.292, 1974.
DOI : 10.1103/PhysRevLett.32.292

H. Chaté, F. Ginelli, F. Grégoire, and . Raynaud, Collective motion of self-propelled particles interacting without cohesion, Physical Review E, vol.77, issue.4, p.46113, 2008.
DOI : 10.1103/PhysRevE.77.046113

A. P. Solon and J. Tailleur, Revisiting the Flocking Transition Using Active Spins, Physical Review Letters, vol.111, issue.7, p.78101, 2013.
DOI : 10.1103/PhysRevLett.111.078101
URL : https://hal.archives-ouvertes.fr/hal-00903641

G. Grégoire and H. Chaté, Onset of Collective and Cohesive Motion, Physical Review Letters, vol.92, issue.2, p.25702, 2004.
DOI : 10.1103/PhysRevLett.92.025702

T. Vicsek, A. Czirók, E. Ben-jacob, I. Cohen, and O. Shochet, Novel Type of Phase Transition in a System of Self-Driven Particles, Physical Review Letters, vol.75, issue.6, p.1226, 1995.
DOI : 10.1103/PhysRevLett.75.1226