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[1]Arxivat 2018-06-01 a Wayback Machine. Bertschinger, L. et al. (eds) (2004). Conclusions from the 1st Symposium on Sustainability in Horticulture and a Declaration for the 21st Century. In: Proc. XXVI IHC – Sustainability of Horticultural Systems. Acta Hort. 638, ISHS, pp. 509-512. Retrieved on: 2009-03-16.
worldcat.org
Crippa, M.; Solazzo, E.; Guizzardi, D.; Monforti-Ferrario, F.; Tubiello, F. N. (en anglès) Nature Food, 2, 3, març 2021, pàg. 198–209. DOI: 10.1038/s43016-021-00225-9. ISSN: 2662-1355 [Consulta: free].