Brocks J.J, Buick R., Logan G.A, Summons R.E.  2003.  Composition and syngeneity of molecular fossils from the 2.78 to 2.45 billion-year-old Mount Bruce Supergroup, Pilbara Craton, Western Australia. Geochimica Et Cosmochimica Acta. 67(22):4289-4319.

Summons R.E, Jahnke L.L, Hope J.M, Logan G.A.  1999.  2-Methylhopanoids as biomarkers for cyanobacterial oxygenic photosynthesis. Nature. 400(6744):554-557.

Logan G.A, Summons R.E, Hayes J.M.  1997.  An isotopic biogeochemical study of Neoproterozoic and Early Cambrian sediments from the Centralian Superbasin, Australia. Geochim Cosmochim Acta. 61(24):5391-409.