Harris, DC. 2010. Charles David Keeling and the story of atmospheric CO2 measurements. Analytical Chemistry. 82 (19): 7865–70. doi:10.1021/ac1001492. PMID20536268
Nemani, RR; Keeling, CD; Myneni. 2003. Climate-driven increases in global terrestrial net primary production from 1982 to 1999. Science. 300 (5625): 1560–3. doi:10.1126/science.1082750. PMID12791990
Harris, DC. 2010. Charles David Keeling and the story of atmospheric CO2 measurements. Analytical Chemistry. 82 (19): 7865–70. doi:10.1021/ac1001492. PMID20536268
Nemani, RR; Keeling, CD; Myneni. 2003. Climate-driven increases in global terrestrial net primary production from 1982 to 1999. Science. 300 (5625): 1560–3. doi:10.1126/science.1082750. PMID12791990