Levin, I., Karstens, U., Eritt, M., Maier, F., Arnold, S., Rzesanke, D., et al. (2020). A dedicated flask sampling strategy developed for Integrated Carbon Observation System (ICOS) stations based on CO2 and CO measurements and Stochastic Time-Inverted Lagrangian Transport (STILT) footprint modelling. Atmospheric Chemistry and Physics, 20(18), 11161-11180. doi:10.5194/acp-20-11161-2020.