R. A.  Berner, The Phanerozoic Carbon Cycle. New York, NY: Oxford University Press, 2004, p. 150.

R. A.  Berner and Maasch, K. A., ?Chemical weathering and controls on atmospheric O2 and CO2: Fundamental principles were enunciated by J. J. Ebelmen in 1845?, Geochimica et Cosmochimica Acta, vol. 60, pp. 1633-1637, 1996.