APA

Park, S., Jimenez, R., Daube, B., Pfister, L., Conway, T., Gottlieb, E., Chow, V., Curran, D., Matross, D., Bright, A., Atlas, E., Bui, T., Gao, R., Twohy, C., & Wofsy, S. (2007). The CO2 tracer clock for the Tropical Tropopause Layer. : Copernicus GmbH (Copernicus Publications).