@Article{ 
  mar08a,
  author = { Martinazzi, Luca },
  title = { Conformal metrics on $\R^{2m}$ with constant Q-curvature },
  journal = { Rend. Lincei Mat. Appl. },
  year = { 2008 },
  volume = { 19 },
  pages = { 279-292 },
  URL = { http://cvgmt.sns.it/paper/296/ },
  note = { cvgmt preprint}
}