Yoko Ohtomo; Takeshi Kakegawa; Akizumi Ishida; Toshiro Nagase; Minik T. Rosing (8 Aralık 2013). "Evidence for biogenic graphite in early Archaean Isua metasedimentary rocks". Nature Geoscience. Cilt 7. ss. 25-28. Bibcode:2014NatGe...7...25O. doi:10.1038/ngeo2025.
Noffke, Nora; Christian, Daniel; Wacey, David; Hazen, Robert M. (8 Kasım 2013). "Microbially Induced Sedimentary Structures Recording an Ancient Ecosystem in the ca. 3.48 Billion-Year-Old Dresser Formation, Pilbara, Western Australia". Astrobiology. 13 (12). ss. 1103-24. Bibcode:2013AsBio..13.1103N. doi:10.1089/ast.2013.1030. PMC3870916 $2. PMID24205812.
Erwin, Douglas H. (9 Kasım 2015). "Early metazoan life: divergence, environment and ecology". Phil. Trans. R. Soc. B. 370 (20150036). s. 20150036. doi:10.1098/rstb.2015.0036. PMC4650120 $2. PMID26554036.
Yoko Ohtomo; Takeshi Kakegawa; Akizumi Ishida; Toshiro Nagase; Minik T. Rosing (8 Aralık 2013). "Evidence for biogenic graphite in early Archaean Isua metasedimentary rocks". Nature Geoscience. Cilt 7. ss. 25-28. Bibcode:2014NatGe...7...25O. doi:10.1038/ngeo2025.
Noffke, Nora; Christian, Daniel; Wacey, David; Hazen, Robert M. (8 Kasım 2013). "Microbially Induced Sedimentary Structures Recording an Ancient Ecosystem in the ca. 3.48 Billion-Year-Old Dresser Formation, Pilbara, Western Australia". Astrobiology. 13 (12). ss. 1103-24. Bibcode:2013AsBio..13.1103N. doi:10.1089/ast.2013.1030. PMC3870916 $2. PMID24205812.
Noffke, Nora; Christian, Daniel; Wacey, David; Hazen, Robert M. (8 Kasım 2013). "Microbially Induced Sedimentary Structures Recording an Ancient Ecosystem in the ca. 3.48 Billion-Year-Old Dresser Formation, Pilbara, Western Australia". Astrobiology. 13 (12). ss. 1103-24. Bibcode:2013AsBio..13.1103N. doi:10.1089/ast.2013.1030. PMC3870916 $2. PMID24205812.
Erwin, Douglas H. (9 Kasım 2015). "Early metazoan life: divergence, environment and ecology". Phil. Trans. R. Soc. B. 370 (20150036). s. 20150036. doi:10.1098/rstb.2015.0036. PMC4650120 $2. PMID26554036.