Bujok, O., Tan, V., Klein, E., Nopper, R., Bauer, R., Gerhards, M.-T., Afchine, A., McKenna, D. S., Engel, A., Schmidt, U., Wienhold, F. G., & Fischer, H. (2001). GHOST - a novel airborne gas chromatograph for in situ measurements of long-lived tracers in the lower stratosphere. Journal of Atmospheric Chemistry, 39, 37-64.