@Misc{ 
  FerLiuMan12,
  author = { Ferrari, Fausto and Liu, Qing and Manfredi, Juan },
  title = { ON THE HORIZONTAL MEAN CURVATURE FLOW FOR AXISYMMETRIC SURFACES IN THE HEISENBERG GROUP },
  journal = {  },
  year = { 2012 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1994/ },
  note = { cvgmt preprint}
}