Miehe et al. 2014

Miehe, Georg, Sabine Miehe, Jürgen Böhner, Knut Kaiser, Isabel Hensen, David Madsen, JianQuan Liu & Lars Opgenoorth. 2014. How old is the human footprint in the world's largest alpine ecosystem? A review of multiproxy records from the Tibetan Plateau from the ecologists' viewpoint. Quaternary Science Reviews 86. 190 - 209.

http://www.sciencedirect.com/science/article/pii/S0277379113004770

@article{jacquesestimative-miehe14footprint,
  author  = {Miehe, Georg and Miehe, Sabine and Böhner, Jürgen and Kaiser, Knut and Hensen, Isabel and Madsen, David and Liu, JianQuan and Opgenoorth, Lars},
  journal = {Quaternary Science Reviews},
  pages   = {190 - 209},
  title   = {How old is the human footprint in the world's largest alpine ecosystem? A review of multiproxy records from the Tibetan Plateau from the ecologists' viewpoint},
  url     = {http://www.sciencedirect.com/science/article/pii/S0277379113004770},
  volume  = {86},
  year    = {2014}
}