@Article{ 
  Li14,
  author = { Li, Yi },
  title = { On an extension of the $H^{k}$ mean curvature flow of closed convex hypersurfaces },
  journal = { Geometriae Dedicata },
  year = { 2014 },
  doi = { 10.1007/s10711-013-9912-8 },
  volume = { 172 },
  number = { 1 },
  pages = { 147-154 },
  URL = { http://cvgmt.sns.it/paper/3282/ },
  note = { cvgmt preprint}
}