Changes in biomarker abundances and sulfur isotopes of pyrite across the Permian-Triassic (PDOI: info:10.1016/j.epsl.2007.07.033v. 262No. 1-2ELSEVIER SCIENCE BV230–239
Fenton, S., Grice, K., Twitchett, R. J., Böttcher, M. E., Looy, C. V., and Nabbefeld, B. 2007. "Changes in biomarker abundances and sulfur isotopes of pyrite across the Permian-Triassic (P." Earth and Planetary Science Letters, 262, (1-2) 230–239. https://doi.org/10.1016/j.epsl.2007.07.033.