References   Treccani.itTreccani.it: Enciclopedia, Vocabolario
(voce: Bacillacee); CABCommonwealth agricultural bureaux International, CAB Thesaurus
; CIRADCIRAD <Centre de coopération internationale en recherche agronomique pour le développement> Dictionnaire des sciences animales, coord. Christian Meyer et Johann Huguenin, 3.ème vers. complète
; ITISITIS Integrated Taxonomicon Information System [partners:] USDA, NOA, USGS, Smithsonian Institution... [et al.], 2016-.
; MBMedicina e biologia. Dizionario enciclopedico di scienze mediche e biologiche e di biotecnologie. Italiano-inglese, inglese-italiano, di Giovanni Delfino ... [et al.], 3. ed., Bologna, Zanichelli, 2012. Con CD-ROM.
; NALTUSDA <United States department of agriculture> - National agricultural library - Inter-American institute for cooperation on agriculture, National Agricultural Library Thesaurus Concept Space
; TaxThe Taxonomicon & Sistema Naturae 2000, editor S.J. Brands
; 
Wikipedia(IT)Wikipedia. L'enciclopedia libera, 2001 [ed. in lingua italiana dell' enciclopedia online Wikipedia]