@Article{Sykora10-EG,
  author =  "Daniel S\'{y}kora and David Sedlacek and Sun Jinchao and John Dingliana and Steven Collins",
  title =   "Adding Depth to Cartoons Using Sparse Depth (In)equalities",
  journal = "Computer Graphics Forum",
  volume =  "29",
  number =  "2",
  pages =   "615--623",
  year =    "2010",
}