H. Ageta, K. Shiojima, and Y. Arai, Acid-induced rearrangement of triterpenoid hydrocarbons belonging to the hopane and migrated hopane series., CHEMICAL & PHARMACEUTICAL BULLETIN, vol.35, issue.7, pp.2705-2716, 1987.
DOI : 10.1248/cpb.35.2705

M. C. Das and S. B. Mahato, Triterpenoids, Phytochemistry, vol.22, issue.5, pp.1071-1095, 1983.
DOI : 10.1016/0031-9422(83)80198-8

E. Fisher, F. Oldfield, R. Wake, J. Boyle, P. Appleby et al., Molecular marker records of land use change, Organic Geochemistry, vol.34, issue.1, pp.105-119, 2003.
DOI : 10.1016/S0146-6380(02)00145-6

V. Geissen, R. Sánchez-hernández, C. Kampichler, R. Ramos-reyes, A. Sepulveda-lozada et al., Effects of land-use change on some properties of tropical soils ??? An example from Southeast Mexico, Geoderma, vol.151, issue.3-4, pp.87-97, 2009.
DOI : 10.1016/j.geoderma.2009.03.011

R. A. Houghton, The Worldwide Extent of Land-Use Change, BioScience, vol.44, issue.5, pp.305-313, 1994.
DOI : 10.2307/1312380

R. A. Houghton, D. L. Skole, and D. S. Lefkowitz, Changes in the landscape of Latin America between 1850 and 1985 II. Net release of CO2 to the atmosphere, Forest Ecology and Management, vol.38, issue.3-4, pp.173-199, 1991.
DOI : 10.1016/0378-1127(91)90141-H

J. Jacob, J. R. Disnar, M. Boussafir, A. Sifeddine, A. L. Albuquerque et al., Pentacyclic triterpene methyl ethers in recent lacustrine sediments (Lagoa do Ca????, Brazil), Organic Geochemistry, vol.36, issue.3, pp.449-461, 2005.
DOI : 10.1016/j.orggeochem.2004.09.005

J. Jacob, J. R. Disnar, F. Arnaud, E. Chapron, M. Debret et al., Millet cultivation history in the French Alps as evidenced by a sedimentary molecule, Journal of Archaeological Science, vol.35, issue.3, pp.814-820, 2008.
DOI : 10.1016/j.jas.2007.06.006
URL : https://hal.archives-ouvertes.fr/insu-00148275

J. Jacob, J. R. Disnar, and G. Bardoux, Carbon isotope evidence for sedimentary miliacin as a tracer of Panicum miliaceum (broomcorn millet) in the sediments of Lake le Bourget (French Alps), Organic Geochemistry, vol.39, issue.8, pp.1077-1080, 2008.
DOI : 10.1016/j.orggeochem.2008.04.003
URL : https://hal.archives-ouvertes.fr/insu-00272141

S. B. Mahato and S. Sen, Advances in triterpenoid research, 1990???1994, Phytochemistry, vol.44, issue.7, pp.1185-1236, 1997.
DOI : 10.1016/S0031-9422(96)00639-5

P. A. Meyers, Applications of organic geochemistry to paleolimnological reconstructions: a summary of examples from the Laurentian Great Lakes, Organic Geochemistry, vol.34, issue.2, pp.261-289, 2003.
DOI : 10.1016/S0146-6380(02)00168-7