Patrick G Hatcher, David J Clifford,The organic geochemistry of coal: from plant materials to coal, Organic Geochemistry, Volume 27, Issues 5–6, 1997,251-274,https://doi.org/10.1016/S0146-6380(97)00051-X.
A.E. Bence, K.A. Kvenvolden, M.C. Kennicutt, Organic geochemistry applied to environmental assessments of Prince William Sound, Alaska, after the Exxon Valdez oil spill—a review, Organic Geochemistry, Volume 24, Issue 1,1996, 7-42, https://doi.org/10.1016/0146-6380(96)00010-1.
Hans H. Richnow, Richard Seifert, Jens Hefter, Matthias Kästner, Bernd Mahro, Walter Michaelis, Metabolites of xenobiotica and mineral oil constituents linked to macromolecular organic matter in polluted environments, Organic Geochemistry, Volume 22, Issues 3–5,1994, 671-IN10, https://doi.org/10.1016/0146-6380(94)90132-5.