References ; Treccani.itTreccani.it: Enciclopedia, Vocabolario
; AGROVOCFAO <Food and Agriculture Organization of the United Nations> AGROVOC Multilingual thesaurus
; ITISITIS Integrated Taxonomicon Information System [partners:] USDA, NOA, USGS, Smithsonian Institution... [et al.], 2016-.
; ; Wikipedia(IT)Wikipedia. L'enciclopedia libera, 2001 [ed. in lingua italiana dell' enciclopedia online Wikipedia]
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