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/