title: Comment on "phase transitions in systems of self-propelled agents and related network models".
abstract: A Comment on the Letter by M. Aldana et al., Phys. Rev. Lett. 98, 095702 (2007)10.1103/PhysRevLett.98.095702.
authors.forename: Hugues
authors.initials: H
authors.lastname: Chaté
authors.forename: Francesco
authors.initials: F
authors.lastname: Ginelli
authors.forename: Guillaume
authors.initials: G
authors.lastname: Grégoire