(en) Woese, C.R., Kandler, O. & Wheelis, M.L. (1990). Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eucarya. Proceedings of the National Academy of Sciences of the United States of America87 (12): 4576–9. PMID2112744. PMC54159. DOI: 10.1073/pnas.87.12.4576.
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(en) Woese, C.R., Kandler, O. & Wheelis, M.L. (1990). Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eucarya. Proceedings of the National Academy of Sciences of the United States of America87 (12): 4576–9. PMID2112744. PMC54159. DOI: 10.1073/pnas.87.12.4576.