@techreport{HeroldThomasFoken2011, author = {Gesa M. Herold and Christoph Thomas and Thomas Foken}, title = {The OP-2 open path infrared gas analyser for CO2 and H2O}, institution = {Geowissenschaften}, series = {Arbeitsergebnisse / Universit{\"a}t Bayreuth, Abteilung Mikrometeorologie}, number = {27}, year = {2011} }