@article{Scheffler2013,
  author    = {Christiane Scheffler},
  title     = {Variable and invariable proportions in the ontogenesis of the human face},
  journal   = {The journal of craniofacial surgery : an international journal dedicated to the practice of the art and science of craniofacial surgery ; official publication of the American Association of Pediatric Plastic Surgeons},
  volume    = {24},
  number    = {1},
  pages     = {237 -- 241},
  doi       = {10.1097/SCS.0b013e31826d07a3},
  year      = {2013},
}