Food and Agriculture Organization of the United Nations. AGRIS/CARIS: Categorization scheme [online]. Prepared by I. PRINCE-PERCIBALLI. FAO-AGRIS-3 Rev. 5.1 (En), FAO-CARIS-7 Rev. 5.1 (En). Rome: Food and Agriculture Organization of the United Nations, August 1998 [cit. 2014-07-14].
Dostupné volně z dokumentačního archivu FAO v kódu HTML: http://www.fao.org/docrep/003/u1808e/u1808e00.htm (angl. verze) a http://www.fao.org/docrep/003/u1808f/u1808f00.htm (franc. verze).