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References to hydrothermal formation

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The reference given is just a page about carpathite and other mineral forms of coronene. The 2 literature references to the hydrothermal work are:

“High Molecular Weight Polycyclic Aromatic Hydrocarbons in Hydrothermal Petroleums”, B. R. T. Simoneit and J. C. Fetzer, Organic Geochememistry: Developments and Applications to Energy, Climate, Environment and Human History, J. O. Grimalt and C. Dorronsoro, eds., A. I. G. O. A., Donostia, San Sebastian, Spain (1995), p. 414-417 “High Molecular Weight Polycyclic Aromatic Hydrocarbons in Hydrothermal Petroleums from the Gulf of California and Northeast Pacific Ocean”, B. R. T. Simoneit and J. C. Fetzer, Org. Geochem., 24 1065-1077 (1996)