Reference
Rodney Garrard, Thomas Kohler, Urs Wiesmann, Martin F. Price, Alton C. Byers, Ang Rita Sherpa (2013): Depicting community perspectives: repeat photography and participatory research as tools for assessing environmental services in Sagarmatha National Park, Nepal. – Nationalpark Hohe Tauern - Conference Volume – 5: 205 - 210.