@Article{ 
  lucnovmur03,
  author = { Lucia, Marcello and Muratov, Cyrill and Novaga, Matteo },
  title = { Linear vs. nonlinear selection for the propagation speed of the solutions of scalar reaction-diffusion equations invading an unstable equilibrium },
  journal = { Comm. Pure Appl. Math. },
  year = { 2004 },
  volume = { 57 },
  number = { 5 },
  pages = { 616-636 },
  URL = { http://cvgmt.sns.it/paper/425/ },
  note = { cvgmt preprint}
}