Wetterbom A, Sevov M, Cavelier L, Bergström TF (2006). "Comparative genomic analysis of human and chimpanzee indicates a key role for indels in primate evolution". J. Mol. Evol. 63 (5): 682–90. doi:10.1007/s00239-006-0045-7. PMID 17075697
Knoll, A. H., Barghorn, E.S, Awramik, S.M,. (1978). New organisms from the Aphebian Gunflint Iron Formation. Journal of Paleontology(52), 1074-1082., en:Fossil에서 재인용