CONCEPTShttp://d-nb.info/gnd/4203674-4d-nb.infohttp://linkeddata.ge.imati.cnr.it:2020/resource/EARTh/69070linkeddata.ge.imati.cnr.ithttp://lod.nal.usda.gov/nalt/67229lod.nal.usda.govhttp://www.eionet.europa.eu/gemet/concept/9108www.eionet.europa.eu。