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Brocks, J. J.; Jarrett, A. J. M.; Sirantoine, E.; Kenig, F.; Moczydłowska, M.; Porter, S.; Hope, J. (2016-03-01). "Early sponges and toxic protists: possible sources of cryostane, an age diagnostic biomarker antedating Sturtian Snowball Earth". Geobiology. 14 (2): 129–149. Bibcode:2016Gbio...14..129B. doi:10.1111/gbi.12165. ISSN1472-4669. PMID26507690.
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Brocks, J. J.; Jarrett, A. J. M.; Sirantoine, E.; Kenig, F.; Moczydłowska, M.; Porter, S.; Hope, J. (2016-03-01). "Early sponges and toxic protists: possible sources of cryostane, an age diagnostic biomarker antedating Sturtian Snowball Earth". Geobiology. 14 (2): 129–149. Bibcode:2016Gbio...14..129B. doi:10.1111/gbi.12165. ISSN1472-4669. PMID26507690.
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Hartman, W.D.; Goreau, T.F. (1970). "Jamaican coralline sponges: Their morphology, ecology and fossil relatives". In Fry, W.G. (ed.). Biology of the porifera. Symposium of the Zoological Society of London. Vol.25. Academic Press. pp.205–243. ISBN0-12-613325-5. OCLC1409104310. (Cited by "Notes of the Sclerosponge Workshop". Stable Isotope Laboratory, Rosenstiel School of Marine and Atmospheric Science. Miami, FL: University of Miami. 21–23 March 1998. Archived from the original on 18 August 2018. Retrieved 19 December 2018.)
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