The art of drystone making

• The art of drystone making, Representative List of the Intangible Cultural Heritage of UNESCO http://ayla.culture.gr/el/η-τέχνη-της-ξερολιθιάς/ 

• International Scientific Society for Drystone Interdisciplinary Study / Société Pierre Sèche (SPS) http://pierreseche-international.org/ 

• International Alliance for Terraced Landscapes (ITLA) 

• Project ALPTER – Terraced landscapes of the alpine arc http://www.alpter.net/