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2. Climats, forêt, et désertification de l’Afrique centrale;Aubréville,1949
3. Quelques aspects de la dynamique actuelle sur versants en Côte d’Ivoire – Adiopodoumé (Ivory coast);Avenard,1972
4. Effects of forest and savanna vegetation isotope composition of sediments from the Sanaga River, Cameroon;Bird;Limnology Oceanography,1994
5. Carbon-isotope indicators of catchment vegetation in the Brazilian Amazon;Bird;Global Biogeochemical Cycles,1992