Kashiyama, Yuichiro (Mei 2008). "Diazotrophic cyanobacteria as the major photoautotrophs during mid-Cretaceous oceanic anoxic events: Nitrogen and carbon isotopic evidence from sedimentary porphyrin". Organic Geochemistry. 39 (5): 532–549. doi:10.1016/j.orggeochem.2007.11.010. Parameter |coauthors= yang tidak diketahui diendahkan (|author= dicadangkan) (bantuan); |access-date= memerlukan |url= (bantuan)
Kump, L.R., Pavlov, A., and Arthur, M.A. (2005). "Massive release of hydrogen sulfide to the surface ocean and atmosphere during intervals of oceanic anoxia". Geology. 33 (5): 397–400. Bibcode:2005Geo....33..397K. doi:10.1130/G21295.1.Selenggaraan CS1: pelbagai nama: senarai pengarang (link)
Hallam, A. (2004). Catastrophes and lesser calamities: the causes of mass extinctions. Oxford [Oxfordshire]: Oxford University Press. halaman 91–607. ISBN0-19-852497-8.
Demaison G.J. and Moore G.T., (1980),"Anoxic environments and oil source bed genesis".American Association of Petroleum Geologists (AAPG) Bulletin. Vol.54,No8.
