@Article{bg-3-539-2006,
AUTHOR = {Köhler, P. and Fischer, H. and Schmitt, J. and Munhoven, G.},
TITLE = {On the application and interpretation of Keeling plots in paleo climate research &ndash; deciphering &delta;<sup>13</sup>C of atmospheric CO<sub>2</sub> measured in ice cores},
JOURNAL = {Biogeosciences},
VOLUME = {3},
YEAR = {2006},
NUMBER = {4},
PAGES = {539--556},
URL = {http://www.biogeosciences.net/3/539/2006/},
ISSN = {1726-4170}
}